Guest Artists/Additional Cast
Leo McKern as Companion?Voice of Gwent
Gary Waldhorn as Winters
Writers
Anthony Terpiloff and Elizabeth Barrows
Director
David Tomblin
Background
Shooting for this episode began on December 20th, 1974. WIth breaks
for Christmas and the New Year, the episode took eleven working days to complete, finishing on January
9th, 1975.
During a make-up session, Prentis Hancock was found
to have a small growth on his neck and was admitted to hospital to have it removed. In the episode Koenig tells Sandra
that Paul had an accident and sustained injuries of two fractured ribs and a broken ankle. Actor Gary Waldhorn takes
over the control of Main Mission as Winters.
Martin Bower designed and built the three Alpha laser tanks and the two
differently scaled Gwent spaceship models over a period of twelve days.
There were extensive problems in getting the paddles of the larger
Gwent to roll correctly when in flight and upon completion of filming Nick Allder smashed it out of sheer frustration.
Companion's bed had already
been seen in 'Collision Course' as Arra's throne.
Information from 'Production Notes: Series One' booklet by Michael
Richardson
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