21 February 1966 saw the broadcast of Trade Secret, the last episode of The Power Game to be screened before the General Election was called and the series was postponed because of its political content. The picture shows Patrick Wymark with Fred Ferris, a prolific supporting actor who had already appeared in The Plane Makers as factory hand Sam Adams. In The Power Game, he plays Paul Budge a long-term executive at Bligh Construction who knows secrets that may be useful to Wilder.

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