S6E14 · Monday

The episode opens in media res with FBI special agent Fox Mulder (David Duchovny) bleeding out from a gunshot wound while Scully tends to him. They are revealed to be hostages in a bank holdup, and Scully attempts to reason with their captor (Darren E. Burrows), only to have him reveal a bomb strapped to his chest. The police begin to storm the building, prompting the gunman to detonate the bomb, killing them all.

Mulder then wakes, unharmed, to find that his waterbed has sprung a leak, his alarm clock is broken, and he needs to pay his landlord for water damage. To do so, he is forced to go to the bank, instead of going to the meeting with his partner Dana Scully (Gillian Anderson), Walter Skinner (Mitch Pileggi) and various other FBI officials. When he arrives, the same gunman, named Bernard, arrives and nervously attempts to rob the bank, shooting Mulder in the process. The teller sets off the bank's silent alarm and police cars come rushing to the scene. Scully arrives and once again attempts to help her partner as he lies dying, but events go the same way - the police rush the building, Bernard detonates the bomb, and everybody dies.

Mulder then wakes to find that his waterbed has sprung a leak, his alarm clock is broken, and he needs to pay his landlord for water damage. Everyone is oblivious to the repetition of events except for Bernard's girlfriend, Pam (Carrie Hamilton). Over multiple iterations of the events, Pam tries various methods to save the agents, including trying to prevent them from entering the bank, informing them of the time loop, and begging Skinner not to let the police into the building. Her dialogue suggests she has lived these events more than fifty times. There are subtle changes in the events, and Mulder and Scully's conversation is worded differently each time, but the results are always the same: Bernard detonates the bomb, usually after shooting Mulder, and everyone in the bank dies.

As the time loop continues, Mulder comes closer to being able to remember Pam. She is finally able to convince him that events are repeating themselves, and before he is killed by the blast, Mulder begins repeating, "He's got a bomb," to himself, in an attempt to remember it the next time around. In the following iteration of the day Mulder finds himself repeating the phrase in the bank, and acting on his hunch, calls Scully and then confronts Bernard before he begins the holdup, changing events on a fundamental level.

Scully, acting on Mulder's phone call, brings Pam into the bank. Mulder and Pam convince Bernard to give up and walk out with Pam. The sirens of the approaching police response become audible and Bernard becomes agitated and attempts to shoot Mulder, but Pam throws herself in front of Mulder as he fires. As she lies dying, she says to Mulder, "This never happened before." Bernard collapses to his knees, horrified by what he has done, and is peacefully arrested. The bomb blast averted, the time loop finally breaks, with Mulder waking up the next morning, informing Scully that his hunch regarding Pam was "just a feeling".