Q: Glenn Martin Christopher Francis Quinn (May 28, 1970 -- December 3, 2002) was an Irish actor. While he was best known for his portrayal of Mark Healy on the popular' 90s family sitcom Roseanne, Quinn also amassed a large fan base for his portrayal of Doyle, a half-demon, on Angel, a spin-off series of Buffy the Vampire Slayer.\n\nAnswer this question based on the passage: who played mark on the tv show roseanne? Let's give stream of consciousness first:
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The important part for answering this question is: While he was best known for his portrayal of Mark Healy on the popular' 90s family sitcom Roseanne, Quinn also amassed a large fan base for his portrayal of Doyle, a half-demon, on Angel, a spin-off series of Buffy the Vampire Slayer. Therefore, the final answer is Glenn Martin Christopher Francis Quinn.
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