The best episode written by Gerald Kelsey is "Checkmate", rated 7.8/10 from 4 user votes. It was "directed by Don Chaffey". "Checkmate" aired on 11/24/1967 and is rated 0.8 point(s) higher than their second highest rated, "The Latin Touch".
Inspired by a large chess game with people taking the place of the game pieces, Number 6 formulates a new escape plan with some compatriots.
Director: Don Chaffey
Writer: Gerald Kelsey
Simon attempts to rescue a kidnapped girl.
Director: John Gilling
Writer: Gerald Kelsey
Simon is marked for death by a Union boss.
Director: John Ainsworth
Writer: Gerald Kelsey
A gang of Italian street urchins rob charity balls.
Director: Jeremy Summers
Writer: Gerald Kelsey