Law & Order: Criminal Intent - Season 6 Episode 4 -

Logan and Wheeler investigate when fireman Ian Duffy is stabbed twenty-two times before driving himself to the fire station and collapsing. When the investigation leads to questions concerning Duffy's sexual preference, Logan and Wheeler end up in the middle of a brawl with the other firemen that leads to an official investigation and a secret involving Duffy's wife, his friend Brendan Keele, and a crime that someone else confessed to years earlier.