Count Down - S1-E9
Continuity mistake: During the transformation scene in X20's room, the clock in his room reads 7.20, but seconds later reads 9.00.

Starring: Lois Maxwell, Ray Barrett, Robert Easton, Don Mason
Count Down - S1-E9
Continuity mistake: During the transformation scene in X20's room, the clock in his room reads 7.20, but seconds later reads 9.00.
Visible crew/equipment: When Phones is unravelling the secret plans, a hand can be seen pulling him back to help unravel the plans.
Trivia: Gerry Anderson based the facial features of Captain Troy Tempest on the American actor James Garner.