4. Hear, Hear (1985)
Penfold's hearing problems make him immune to a device that brainwashes anyone who hears Greenback's voice.
Release date: 1985-01-17
Season number: 6
Episode number: 4
Runtime: 30 minutes
Director: Brian Cosgrove
Writer: Brian Trueman
Cast
Rest of the cast - click here to expand
Edward Kelsey - Colonel K / Baron Greenback (voice)