Plot summary
Avery Hubert and Woody Sage, who are both cheating on their spouses, run off together and disappear. Woody's older wife is a former cop turned true crime author, Kathy Jarrow, who used to date Captain Ross, so he assigns Goren and Eames to the case. When Avery doesn't make it to her parents in Maine, they question her husband, Roy Hubert. Roy's ex-wife Trina Melda provides a sex tape with Roy as an alibi. Kathy becomes a suspect soon afterwards.
Credits
Adapted from Wikipedia contributors, Law & Order: Criminal Intent season 7. HTML formatting and reference markers removed.