The Production Guide
Script To Screen: Matter of Life and Death
by Martin Willey

The crew wear coats and masks to protect themselves from the wind and debris. Sitting on the right with the open folder is Gladys Goldsmith, responsible for continuity. By her on the right in a white smock is director Charles Crichton, with assistant director Ken Baker behind him.
The camera on the wheeled dolly platform is the standard 35mm Mitchell camera used to film the series. For the action shots, two 35mm Arriflex cameras were also used to capture the action from multiple angles. These were "wild", without synchronised sound.
The Mitchell would be "locked off" for the final scene 83, when the planet is restored to normal. The camera is fixed in position, and the focus locked, while the crew spend a few hours restoring the set in front.

Third assistant director Roy Button operates the clapperboard. He, and the actors, are the only ones not wearing protective gear.
Two stunt performers, Paul Weston and Dorothy Ford, play Koenig and Bain for certain scenes, specifically when the trees fall in front of them, and in the rock avalanche.
Prentis Hancock and Nick Tate are on standby in the morning, but both their characters are dead at this point in the story. They are still shooting some of the commlock scenes when Koenig is talking to Bergman, Carter or Morrow (first started on Wednesday). These scenes are marked "to complete" here. Most of these scenes had to be filmed from repeatedly, from several angles, so the editor had enough varied material to assemble the sequence.