Natalie Distler

Mike's Christmas spirit gets dampened when Ryan, the father of Kristin's baby, unexpectedly comes back to town after a long absence.

Tommy copes with the loss of his father and a new man (Michael J. Fox) in Janet's life; Sheila finds a different way to deal with her issues; Sean, Franco and Mike concoct a surefire way to get rich.

Tensions run high as Needles holds the guys accountable for their lack of judgement; Tommy takes responsibility for Damian's future in the firehouse.

Franco steps into the ring; an act of goodwill backfires on the crew; Sean reveals his financial scheme.

Tommy tries to navigate a touchy issue with Colleen; Genvieve's interviews spark controversial viewpoints about the political and religious implications of Sept. 11, which Mike will not tolerate.

Lou and Tommy vie to be the last single man standing; Garrity looks worse than the guys expected, and they have no idea how far from reality Garrity has drifted.