Valentine Dyall

Blackadder (1983)

Guest starring as Angus, A Lord

The Hitch Hiker's Guide to the Galaxy (1981)

Guest starring as Deep Thought

Secret Army (1977)

Starring as Dr. Pascal Keldermans

Doctor Who (1963)

Guest starring as Black Guardian (13 episodes)

Episode 20x09: Mawdryn Undead, Part One (Feb 1, 1983)
Episode 20x10: Mawdryn Undead, Part Two (Feb 2, 1983)
Episode 20x11: Mawdryn Undead, Part Three (Feb 8, 1983)
Episode 20x12: Mawdryn Undead, Part Four (Feb 9, 1983)
Episode 16x26: The Armageddon Factor, Part Six (Feb 24, 1979)
Episode 20x13: Terminus, Part One (Feb 15, 1983)
Episode 20x14: Terminus, Part Two (Feb 16, 1983)
Episode 20x15: Terminus, Part Three (Feb 22, 1983)
Episode 20x16: Terminus, Part Four (Feb 23, 1983)
Episode 20x17: Enlightenment, Part One (Mar 1, 1983)
Episode 20x18: Enlightenment, Part Two (Mar 2, 1983)
Episode 20x19: Enlightenment, Part Three (Mar 8, 1983)
Episode 20x20: Enlightenment, Part Four (Mar 9, 1983)
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