Colin had been robbing several bars in Philadelphia by dating the bartenders and using their relationship as a way to case the bars and get access to their safes. He pulled the same stunt on Dee and Paddy's but stuck around because he didn't want his cover blown. Dennis eventually figured out his plan and baited him back to Paddy's to catch him in the act, but accidentally shot Charlie while he was robbing the bar. While the gang was at the hospital, Colin robbed Paddy's again. ("Gun Fever")
Colin is a womanizer and gun enthusiast. He dated several bartenders at the same time while robbing their bars. While on a date with Dee, he seemed much more interested in guns than her.
- Colin is portrayed by Michael Rosenbaum. Michael is best known for portraying Lex Luthor on Smallville. He is also a trained voice actor and has lent his voice to many cartoons including Justice League and Batman Beyond.