|Roseanne||1997 1990 - 1997||Actor||Mark Healy||19977|
|Angel||1999 1999||Actor||(regular to 11/30/99)||19997|
|Dr. Giggles||1992||Actor||Max Anderson||19927|
|R.S.V.P.||2001||Actor||Professor Hal Evans||20017|
|Covington Cross||1993 1992 - 1993||Actor||Cedric||19937|
|Live Nude Girls||1995||Actor||Randy||19957|
|Beverly Hills 90210||1990 1990||Actor||1st Party Jock||19907|
|Call Me Anna||1990||Actor||George Chakiris||19907|
|Appeared in the independent feature "Live Nude Girls"|
|Appeared in the pilot of Aaron Spelling's long-running teen drama series "Beverly Hills, 90210" (Fox)|
|While holding down a recurring role on "Roseanne", starred in the short-lived medieval England-set adventure series "Covington Cross" (also ABC)|
|Made feature debut as the drummer of the band in the 1950s-set musical "Shout"|
|Cast as the lead in the horror thriller "R.S.V.P."|
|Moved to the USA from Dublin|
|Played actor George Chakiris in the Patty Duke TV biopic "Call Me Anna"|
|Had a non-speaking role in the Richard Marx music video "Satisfied"|
|Was featured in the episodic thriller "Campfire Tales"|
|Was briefly a regular on The WB supernatural series "Angel", a spin-off of the popular "Buffy the Vampire Slayer"; dropped after a handful of episodes "for storyline purposes"|
|Had first speaking role in an episode of "The Outsiders" (Fox)|
|Played supporting role in the gory horror film "Dr Giggles"|
|Played daughter Becky's punk boyfriend turned responsible husband on "Roseanne" (ABC)|
|Played the manager of a doomed rock band in the VH1 original movie "At Any Cost"|
|Louisa Quinn||Sister||born c. 1980|
|Sonya Quinn||Sister||born c. 1968|
|Quinn co-owns a club in L.A. called Goldfingers.|
A lot can happen over the course of a television series, and a lot can happen to a character over the course of that series. Sometimes, though, there's a complete overhaul that makes you wonder if the character we meet at the beginning of the series and the one at the end are the same person. From the night-and-day transformation of Kelly (Mindy Kaling) on 'The Office' to the extreme dope-ification of Eric (Will Friedle) on 'Boy Meets World,' check out our gallery of Major Character Ch-Ch-Ch-Cha
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