A man gets a second chance to prove his innocence, but is punished anyway...
Martin Wells wakes up in a cell, with a freshly stitched wound on his face. He recognises Doggett, and as he is led to a van he sees another familiar face - Al Cawdrey, his father-in-law. Cawdrey shoots him, and as Martin dies, he sees the second hand of Scully's watch start to tick backwards.
Martin wakes up in jail with no sign of a gunshot wound. When Doggett and Scully visit him with evidence that proves that he murdered his wife, he has no idea what they are talking about. He is even more confused when he finds out that the day is Thursday, as his yesterday was Friday. He tells the Agents that he is innocent, but is more confused when footage from a hidden camera retrieved by his daughter's nanny shows him breaking into his own house.
Next morning, the wound on his face is gone, and his attorney Janet Wilson has no knowledge of the nanny-cam footage. The day is Wednesday - time is moving backwards for Martin. Later that day, he is attacked by a prisoner with a spider web tattoo, who slashes open his face. When telling Scully and Doggett that he's moving backwards in time, he remembers the identity of the killer - it's Cesar Ocampo, the man with the tattoo.
The next day, Martin wakes in Doggett's house - it's the day after the murder. They visit the crime scene, and retrieve the nanny cam footage - which shows no intruders. Martin realises that the nanny, Trina, knew where the camera was and could have told the killer. They visit Trina's house and Doggett arrests Ocampo, but Trina is too scared to testify.
It turns out that Martin helped sentence Ocampo's brother Hector to life, although there was evidence to exonerate him. Martin promises to review the case, but Hector has committed suicide - and there's now enough evidence to charge Martin with his wife's murder.
On the day of the murder, Martin warns Doggett of the impending crime - Doggett doesn't believe him. Even though it could result in a jail sentence, Martin admits to Hector Ocampo's mistrial.
At his apartment, he finds police have already searched it, but found no evidence of a crime. Alone, he hears the intruder at the front door - grabbing the kitchen knife he was meant to kill his wife with, he investigates. It's Vicky, his wife... but there's someone else letting themselves in, too. Hiding Vicky and calling the police, Martin faces Ocampo, who beats him up and makes to cut Vicky's throat with the same knife.
In the nick of time, Scully and Doggett burst in, shooting Ocampo. Scully's wristwatch starts ticking forward again. Martin Wells is eventually jailed for his unjust conviction of Hector Ocampo, but his wife is saved.