Graham McTavish
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Graham McTavish is a British television actor.
He has played the character Warden Ackerman in Red Dwarf in five episodes of series 8. McTavish has also had many supporting roles in British dramas and films such as Casualty , Jekyll , The Bill and Taggart. He also played the ill-tempered Lewis in Rambo and had a role in the fourth series of Lost.