CUs of Gerry Potterton and Julian Biggs discussing film. Shot of Jo Kirkpatrkck listening in. LS of office, Gerry Potterton and Julian Biggs talking, gesticulating. CUs of hands preparing 35mm color camera on location, adjusting lens, connecting this and that. Shots of Bob Humble, Gerry Potterton discussing a shot. Shot of Potterton peering into viewfinder. Shot of sensitive microphone, of clapper. CUs of Julian Biggs, Gerry Potterton and Jo Kirkpatrick discussing film. FOLLOW SHOT of four men riding speeder over high trestle. Shot of Bob Humble and assistants setting up camera. CU of rear lantern of train, passing scenery in background. CU of blurred scenery from moving train. CU of tracks and ties from moving train. Sequence at railway crossing, people crossing, barrier coming down, traffic stopping, barrier rising, cars moving through. Front TRAVELLING SHOT as camera vehicles speed through and out of tunnel onto view of the Rockies. TRAVELLING SHOT of track snaking through mountains. Shot of Bob Humble examining reels of positive rushes, replacing reels into cans. MSs of camera, Bob Humble shooting, displacing camera to top of vehicle. Profile shot of Bill Bradley driving vehicle. Shots of Humble at camera, speaking into microphone. Shots of diesel locomotive approaching, coupling with car, pulling it away.