Glenn Quinn evelation. His marriage disintegrated, and he took to hiding behind the flimsy veneer of a ne'er-do-well hustler, seemingly more interested in where his next drink was coming from than in helping others. However, he's a kind of halfling telephone for messages from the Beyond that come accompanied by a blinding migraine. Armed with little more than pictures and sometimes a name, he sought out Angel and instructed the vampire to use his gift (or curse) to help those in danger.  Doyle is human - on his mother's side. He's never met his father, a Bracken demon, and his spiky green demon genes didn't manifest physically until he was 21 years old. A grammar school teacher then married to the love of his life, Harriet, Doyle did not cope well with the  Glenn Quinn is probably best known to American television audiences as Becky's troubled but loving husband, Mark, on the hit sitcom Roseanne. Suppressing his Irish accent for the role, his performance was so convincing that few people realized he wasn't American. Fortunately, he used his native accent in the role of Doyle, Angel's spiritual mentor.