1 00:00:04,530 --> 00:00:09,810 The blue police-box shape of the TARDIS rushes forward through the space-time vortex. 2 00:00:09,880 --> 00:00:20,470 The Doctor's face, wide eyed and curly haired, forms in the tunnel of onrushing light; then is replaced by the words DOCTOR WHO in a diamond-shape logo. 3 00:00:24,240 --> 00:00:26,240 The Sontaran Experiment. 4 00:00:26,480 --> 00:00:28,480 By Bob Baker and Dave Martin. 5 00:00:28,680 --> 00:00:30,680 Part 1. 6 00:00:32,480 --> 00:00:36,830 Earth in the far future is recovering from devastating solar flares. 7 00:00:37,440 --> 00:00:45,860 Horizon to horizon, there are no trees, no animals, just low, dense scrub under a flat, grey sky. 8 00:00:46,000 --> 00:00:50,560 Nestled in the scrub, 12 tarnished metal balls, arranged in a circle 9 00:00:50,640 --> 00:00:58,000 The Doctor, a tall man wearing an over-coat, floppy hat and long scarf materialises in the circle. 10 00:00:58,690 --> 00:01:02,690 He takes in the rolling hills and the craggy granite outcrops. 11 00:01:03,520 --> 00:01:12,380 Royal Navy Surgeon Harry Sullivan, dark hair, square jawed, in a fawn coat, materialises nearby, then disappears again with a look of surprise. 12 00:01:15,010 --> 00:01:17,710 He reappears ... and disappears. 13 00:01:21,320 --> 00:01:24,320 He finally stabilises. 14 00:01:34,200 --> 00:01:37,200 The Doctor crouches in front of one of the globes. 15 00:01:44,960 --> 00:01:47,150 Sarah is stuck in a bush. 16 00:01:51,680 --> 00:01:54,680 As Harry walks away, the Doctor polishes the transmat globe with his hanky. 17 00:02:00,850 --> 00:02:06,020 Sarah, brightly dressed in yellow rain-gear is stuck awkwardly in a bush. Harry takes her hands and helps her up. 18 00:02:18,000 --> 00:02:34,370 Sarah and Harry make their way through the green and russet and mustard coloured bushes. They jog back up to the circle, but the Doctor is scrutinising the refractor and does not notice them. Sarah playfully pulls her beanie down over her eyes and makes a funny face. 19 00:02:38,440 --> 00:02:44,890 He removes the maintenance port cover of the transmat refractor and peers doubtfully inside. 20 00:03:14,600 --> 00:03:18,540 The Doctor is repairing the refractor with his sonic-screwdriver. 21 00:03:29,480 --> 00:03:35,370 Leaving the Doctor to his repairs, Sarah and Harry stride off. 22 00:03:35,440 --> 00:03:38,440 Later, they explore a gully with steeply sloping sides. 23 00:04:13,680 --> 00:04:16,990 Moving swiftly, some *thing* disappears behind the hilltop. 24 00:04:38,770 --> 00:04:42,820 He puts his arm companionably around her shoulders and they continue walking. 25 00:04:42,920 --> 00:04:48,110 The transmat circle. The Doctor works on the globe, polishing components on his scarf. 26 00:04:48,280 --> 00:04:57,210 He is being watched. Crouching in the scrub two dishevelled men wearing partial space suits have the Doctor in the sights of a futuristic side arm. 27 00:05:04,840 --> 00:05:10,170 Sarah and Harry explore a rocky path through a valley. 28 00:05:13,840 --> 00:05:18,240 [FAST] Losing his footing, Harry tumbles down a steep slope. He lays there, unmoving. 29 00:05:20,070 --> 00:05:21,460 A camp. 30 00:05:24,840 --> 00:05:31,320 Erak runs towards a basic camp in the shelter of a granite outcrop. Krans, a bearded man, tends a small fire. 31 00:05:42,640 --> 00:05:45,030 [FAST] He stands, picking up a rifle. 32 00:05:49,640 --> 00:05:54,640 At the bottom of the ravine, Harry stirs and gets to his feet, clutching his arm. 33 00:06:23,120 --> 00:06:29,320 The Doctor is busy working on the transmat refractors, and doesn't notice Zake watching him warily. 34 00:06:29,520 --> 00:06:32,460 Behind Zake, a strange silver machine appears. 35 00:06:32,560 --> 00:06:34,560 Alarmed, Zake jumps to his feet and sprints away. 36 00:06:35,160 --> 00:06:40,360 Oblivious, the Doctor rests his sonic-screwdriver on top of a globe as he rummages inside. 37 00:06:40,440 --> 00:06:41,990 Zake *runs*. 38 00:06:42,200 --> 00:06:49,800 The machine is a large, shiny robot that resembles both an insect and a crab. It glides swiftly across the heath on articulated legs. 39 00:06:52,220 --> 00:06:54,100 It closes in on Zake. 40 00:06:55,440 --> 00:06:59,440 Zake stops short at the edge of a rough weathered granite cliff, he then half jumps and half falls to escape the robot. 41 00:07:03,120 --> 00:07:05,430 The transmat circle. 42 00:07:05,960 --> 00:07:08,960 The Doctor jumps up and runs towards the cry, leaving his screwdriver behind. 43 00:07:11,440 --> 00:07:17,560 He locates Zakes body at the bottom the cliff and gingerly slides down to help. The robot is nowhere to be seen. 44 00:07:20,540 --> 00:07:26,300 He examines Zakes awkwardly twisted body. Zake is dead. 45 00:07:26,301 --> 00:07:29,850 From the cliff top, Erak and Krans point their guns at the Doctor. 46 00:07:34,620 --> 00:07:35,910 Erak aims. 47 00:07:37,420 --> 00:07:39,860 The Doctor falls beside Zake. 48 00:07:40,160 --> 00:07:43,110 Sarah runs into the transmat circle. 49 00:07:43,950 --> 00:07:46,950 It is deserted; the Doctor missing. 50 00:07:48,200 --> 00:07:52,440 She looks around, puzzled. 51 00:07:55,860 --> 00:08:00,950 She notices the slender sonic-screwdriver that the Doctor left resting on top of the transmat globe. 52 00:08:00,951 --> 00:08:03,951 She picks it up, looking worried. 53 00:08:04,280 --> 00:08:08,160 Harry is waiting for rescue in the gloom at the bottom of the ravine. 54 00:08:09,880 --> 00:08:12,880 A scattering of pebbles fall around him. 55 00:08:14,720 --> 00:08:17,720 Suddenly, giant rocks crash down. 56 00:08:17,560 --> 00:08:22,600 Harry scrambles for cover. He finds a small cave in the rock hidden by creepers and ducks into it. 57 00:08:22,601 --> 00:08:23,970 [FAST] The transmat circle. 58 00:08:28,420 --> 00:08:33,340 Sarah looks around. Then she clutches the sonic-screwdriver tightly and runs off. 59 00:08:34,280 --> 00:08:44,040 Erak and Krans carry the Doctor’s body between them, but they are watched from high on a nearby hill by another bearded man in a partial space suit. 60 00:08:44,240 --> 00:08:45,970 Sarah returns to the ravine. 61 00:08:50,730 --> 00:08:53,960 Leaning over the edge, she sees Harry is gone. 62 00:08:55,000 --> 00:08:59,000 She contemplates the broken sticks that were covering the ravine. 63 00:08:59,890 --> 00:09:02,920 She looks around, unsettled. 64 00:09:03,200 --> 00:09:20,480 Erak and Krans return to camp and drop the Doctor’s body. Both men are unkempt and dirty. Erak is tall and lean with wide eyes; Krans is shorter with dark hair. The camp is little more than a hollow in the steep slope of a weathered granite outcrop, affording a little protecton. 65 00:09:21,320 --> 00:09:23,290 Krans tends to the fire. 66 00:09:36,920 --> 00:09:41,590 Erak draws a machete from a scabbard on his belt, and cuts the rope around the Doctors ankles. 67 00:09:43,770 --> 00:09:48,260 Then he drags the Doctor roughly to his feet and holds him fast. 68 00:09:49,070 --> 00:09:54,740 Krans approaches with a large stick, glowing with the heat of the fire, and waves it in the Doctor's face. 69 00:10:05,400 --> 00:10:10,900 Near the top of the ravine, Sarah is resourcefully dragging a large, dead tree branch. 70 00:10:11,160 --> 00:10:14,160 Suddenly she catches movement from the corner of her eye. 71 00:10:18,840 --> 00:10:26,530 In the cave, Harry crawls through a narrow crack between two massive plates of granite rock towards light. 72 00:10:29,440 --> 00:10:36,330 He emerges from between a jumble of mossy boulders, and staggers forward towards a craggy granite hill. 73 00:10:37,480 --> 00:10:44,060 Sarah awkwardly uses her dead tree branch to reach down into the ravine where she last saw Harry. 74 00:10:44,240 --> 00:10:47,240 She is unaware that someone is creeping up behind her. 75 00:10:48,040 --> 00:10:53,180 The bearded man who watched the Doctor from the hill, clamps his dirt streaked hand over her mouth, 76 00:10:54,080 --> 00:10:57,080 He drags her roughly away, pulling her behind a large boulder. 77 00:11:00,560 --> 00:11:14,030 The robot appears, gliding smoothly through the rocky gully and comes to a stop close to their hiding place. It has two visual sensors like torches either side of its flat, trapezoid head; it is bristling with antennae that twitch and scan, searching out prey. 78 00:11:14,920 --> 00:11:17,020 It turns its head too and fro. 79 00:11:26,170 --> 00:11:30,200 Eventually, it moves away. 80 00:11:41,640 --> 00:11:45,260 The man breaks cover to check the robot has really gone. 81 00:11:45,720 --> 00:11:48,720 He returns, his posture hunched and defensive. 82 00:12:06,480 --> 00:12:09,480 Roth jumps up and gestures towards the ravine that Harry fell into. 83 00:12:34,520 --> 00:12:37,520 Roth rolls up a sleeve. 84 00:13:04,700 --> 00:13:06,700 At the camp. 85 00:13:14,520 --> 00:13:16,420 [FAST] A tall man with beard and sandy hair. 86 00:14:55,680 --> 00:14:57,680 He squints at Vural’s suit. 87 00:14:59,430 --> 00:15:01,430 He stares at a small stud below Vural's collar. 88 00:15:08,400 --> 00:15:13,400 Elsewhere the Doctor’s enlarged face shows on a monitor screen, transmitted by the microcamera on Vurals suit. 89 00:15:13,720 --> 00:15:18,720 A large, three fingered hand with skin the texture of a hog operates a series of controls mounted beneath. 90 00:15:20,280 --> 00:15:25,110 The robot rises from a concealed position in the scrub, elevating itself on its insect-like legs. 91 00:15:28,320 --> 00:15:32,410 It swiftly scans its environment and moves off, antennae twitching. 92 00:15:40,920 --> 00:15:44,910 Meanwhile, Harry works his way back around a massive granite formation. 93 00:15:45,120 --> 00:15:49,180 Now at the camp, the motley GalSec crew deliberate around the fire. 94 00:16:37,720 --> 00:16:40,720 Roth leads Sarah briskly through the scrub along a slope. 95 00:16:48,560 --> 00:16:52,220 Roth turns away and huddles, child-like against the slope. 96 00:17:05,480 --> 00:17:10,740 He turns away, frightened. Sarah puts her hand on his arm, then leaves him. 97 00:17:11,100 --> 00:17:12,590 Roth reluctantly follows. 98 00:17:12,591 --> 00:17:13,891 The GalSec camp. 99 00:18:25,040 --> 00:18:27,300 [FAST] Sarah is watching from behind a rock. 100 00:19:10,240 --> 00:19:14,270 Roth bolts. Erak and Krans chase after him, and Vural follows. 101 00:19:14,640 --> 00:19:17,970 Sarah leaves the cover of the rock to free the Doctor. 102 00:19:18,720 --> 00:19:21,720 She takes Erak’s machete and cuts the ropes. 103 00:19:28,000 --> 00:19:31,490 Sarah leads the Doctor away through the scrub and rocks. 104 00:19:42,240 --> 00:19:44,140 Erak taps the side of his head. 105 00:19:44,880 --> 00:19:47,880 The three of them jog back to the Campsite. 106 00:19:53,680 --> 00:19:56,680 They discover the Doctor missing. 107 00:20:02,540 --> 00:20:04,540 Erak grabs his machete. 108 00:20:04,880 --> 00:20:11,580 Sarah leads the Doctor through the heather and over the crest of a steep hill. Roth joins them and runs on ahead. 109 00:20:23,200 --> 00:20:28,540 The Galsec men cautiously comb the steep rocky landscape, weapons drawn, searching for the Doctor. 110 00:20:34,280 --> 00:20:37,270 The doctor looks into the ravine. 111 00:20:44,480 --> 00:20:49,860 The Doctor crouches and sniffs the ground, then tastes a little on the tip of his finger. 112 00:21:20,320 --> 00:21:22,590 He beams. 113 00:21:36,080 --> 00:21:37,270 The Doctor slips! 114 00:21:40,040 --> 00:21:42,510 He tumbles awkwardly down into the ravine. 115 00:21:42,680 --> 00:21:45,800 Sarah and Roth peer over the edge of the ravine. 116 00:21:46,120 --> 00:21:50,120 Suddenly, the robot appears behind them. They’re trapped! 117 00:21:51,080 --> 00:21:55,080 Roth recoils in fear, shaking his head and holding his arms up protectively 118 00:21:55,240 --> 00:21:59,240 The machine scans them, antennae waving too and fro. 119 00:22:01,600 --> 00:22:10,020 Meanwhile, Harry nimbly climbs up a steep jumble of huge granite boulders, to a short passage between massive slabs of grey, weathered rock. 120 00:22:15,200 --> 00:22:20,880 He comes out on the other side of a hill. He creeps stealthily down, careful to keep his balance. 121 00:22:24,680 --> 00:22:27,680 He sees something and ducks down behind a rock. 122 00:22:30,000 --> 00:22:38,560 There's a spaceship nestled in the rocks, a iron-grey metal ball, the size of a small cottage, its surface scored with a regular diamond-grid pattern. 123 00:22:39,480 --> 00:22:48,470 The bottom of the ravine. Rainwater dripping off the vegetation splashes the Doctor's face and he revives, blinking and clutching his head. 124 00:23:01,720 --> 00:23:07,080 Elsewhere, Harry, careful to stay under cover, works his way closer to the strange ship. 125 00:23:07,320 --> 00:23:12,520 He sees the robot arrive, dragging Roth and Sarah, both held fast by metal cords. 126 00:23:13,080 --> 00:23:16,080 It stops in front of the ship and a door in the side opens. 127 00:23:16,360 --> 00:23:21,880 A short, powerful figure appears, wearing soft, metallic armour and a dome shaped helmet. 128 00:23:26,080 --> 00:23:34,370 The figure removes its helmet from the wide locking collar. Underneath are the lumpy, troll like features of a Sontaran! 129 00:23:38,800 --> 00:23:50,060 That episode of Doctor Who featured Tom Baker, Elizabeth Sladen, Ian Marter Donald Douglas, Glynn Jones, Peter Walshe Kevin Lindsay, Peter Rutherford and Terry Walsh 130 00:23:50,240 --> 00:23:59,160 Title Music by Ron Grainer and the BBC Radiophonic Workshop Incidental Music by Dudley Simpson Special Sound by Dick Mills Sound by Vic Godrich 131 00:23:59,240 --> 00:24:09,430 It was written by Bob Baker and Dave Martin The script editor was Robert Holmes It was Produced by Philip Hinchcliffe And Directed by Rodney Bennet Copyright BBC 1975 132 00:24:09,480 --> 00:24:13,540 Independently described by Brett Coulstock.