Ian Collier
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Ian Collier is a British actor.
He has appeared in various television programmes including Rentaghost, Hi-de-Hi! and Howard's Way. He was also one of two actors to portray the villain Omega from the science fiction series Doctor Who (the other being Stephen Thorne). Collier portrayed Omega in the Fifth Doctor serial Arc of Infinity and later in the Big Finish Productions audio drama Omega. He also played Doctor Who companion Bernice Summerfield's father, Isaac Summerfield in Death and the Daleks.