A. In Episode 11, of Season 6, "Talk to the Hand".
Quinn's partner, Angel, went to Steve Dorsey's apartment to check up on a video Steve had left on Gellar's website.
Quinn was
supposed to go along, but he wasn't answering Angel's phone calls, so
Angel went in alone.
That was a mistake. While he was
questioning Dorsey's wife, Beth, Travis knocked him out with a crucifix
and tied him up.
In this brief scene, Quinn is driving in his car when he gets a call from Debra.
She tells
him that Angel went to check Dorsey's house, and that they are concerned
about him because Steve Dorsey turned up dead on the Ricochet Rabbit.
Debra wants to know why Quinn isn't there backing up his partner.
Quinn realizes that he (and Angel) are in hot water. He hangs a U-turn and speeds towards Dorsey's house.