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Speaking to TV Squad, Helfer said: "When we started the second season, every episode my hair gets thinner and thinner and thinner, and shorter and shorter and shorter - and then finally it started falling out in chunks and they had to give me a wig."
Since filming concluded on Battlestar Galactica's final episode, Helfer has secured a guest role in the second season of espionage comedy Burn Notice for a seven-episode stint.
> Click here to read our review of Battlestar Galactica's fourth season
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