Roger [Delgado], amongst other things, was terrified of water. This was slightly inconvenient as a large part of The Sea Devils was set at sea; but we knew that Roger would not let us down. There was one sequence, however, during which I got very angry with one of the production team members.
The scene involved Roger and me floating in the sea whilst wearing inflatable immersion suits. We had a hell of a job trying to persuade Roger to get into his immersion suit in the first place, because he knew we were going to put him in the water, and he didn’t want to go in the water. We managed to get him in the suit, and Katy [Manning] and I talked to him very gently — Katy was always very good at calming Roger down — and eventually we reached the point at which he was about to agree to be floated in the water in order to get an establishing shot before a stuntman took his place as the Master was hauled from the water into a boat. Then an assistant director suddenly butted in with: ‘Oh, come on Roger. For God’s sake, we’ve waited enough already…’ I turned on him immediately.
‘Oh belt up!’ I said sotto voce. ‘We’ve had enough trouble getting Roger into the suit in the first place, and now you come up and start upsetting his confidence. Why don’t you just jump into the sea and cool off.’
Michael [Briant], the director, hurried over when he saw what was happening and took the assistant director to one side, saying, ‘Look, leave Roger alone. Let him do it in his own time.’
Eventually, after about forty minutes, the director got the shot he needed of the Master floating in the water. Roger needed gentle persuasion and calm reasoning to get him to do these things, and the fact that he did made me immensely proud of the man. There are not many who can face up to their fears as Roger did, and this made him one of the bravest men I knew." — Jon Pertwee, I Am the Doctor (via the-bluest-ink)