Bishop (First appearance)
- Wolverine (future) (Only Appearance)^[1]
- Forge (Only Appearance)^[1]
- Two unnamed mutants - one can shoot electricity from her hands, the other can turn his arms to metal and run at great speeds.

Villains:

Sentinels
Nimrod (Only Appearance)^[1]

Other Characters:

Protestors (future - Bishop's memories)
Anti-mutant campaigner (future - Bishop's memories)
Mutant prisoners (future - Bishop's memories)
Human soldiers (future - Bishop's memories)
President of the United States (future - Bishop's memories)

Locations:

Earth-31393 (Reality)
- New York City
  - Ruined streets
  - Concentration camp
  - Cemetery
  - Rebel hideout
Earth-92131 (Reality)
- Streets and back alleys
- Jail
- Xavier Institute
  - War room
  - Entrance hall
  - Corridor

Items:

Temporal transceiver
Bishop's gun

Vehicles:

Synopsis for "Days of Future Past" (Part 1)

In a dystopian future in the year 2055 AD, a mutant named Bishop is a Tracker, hunting other mutants for the ruling Sentinels. When he reaches his quota, however, the Sentinels turn on him. With help from the mutant rebels, he travels through time back to the present in order to stop a member of the X-Men from assassinating someone. Unfortunately, when he comes to the present, he cannot remember who the assassin is, and sets out to kill any and all X-Men. He is subdued by Wolverine, whom he knows from his own time.

The X-Men, especially Wolverine, do not believe his story at first, despite Professor Xavier scanning his mind with Cerebro. However, when the super-Sentinel Nimrod follows Bishop back in time, the X-Men unite to fight it off. Although they break it apart, it is about to repair itself until Bishop destroys its temporal transceiver, sending it back to the future.

The episode ends on a cliffhanger, when Bishop remembers that Gambit is the assassin. Furious, Bishop draws his gun and fires...

Notes

This episode is loosely based on The Uncanny X-Men #141, the first part of the Days of Future Past story arc. The entire story was retooled to fit the continuity established in the animated series, however some original elements remained:
- Much like his Earth-811 counterpart, Wolverine led a resistance against the Sentinels.
- Bishop's role as a tracker of Mutant rebels is reminiscent of Rachel Summer's role as a Hound, likely adapted from Uncanny X-Men #189.
- Similarly, Bishop's betrayal of the Sentinels and travel back in time is adapted from Kate Pryde's similar stunt in X-Men #141.
- Nimrod's appearance and battle with the X-Men is likely adapted from Uncanny X-Men #191 and 194.

Bishops' assertion that Gambit betrayed the X-Men is adapted from Uncanny X-Men #287 wherein Bishop's future the X-Men were apparently killed by one of their own, and as Gambit was the only survivor Bishop long suspected him of betraying the X-Men.

In the future reality depicted in this episode, Wolverine walks past graves of the old X-Men:
- Cyclops, d. 2032
- Rogue, d. 2033
- Storm, d. 2021
- Jubilee, d. 2010

Other graves are seen, but the inscriptions cannot be discerned.

The President seen in Bishop's memories, weeping as the Sentinels take control, is the same woman from "Night of the Sentinels (Part 2)" who told Gyrich to close down the Sentinel programme.

Trivia

While visiting Beast in jail, Rogue gives him a copy of You Can't Go Home Again by Thomas Wolfe, which he identified as an "old favourite". The book explores themes about the passage of time, which is appropriate to the episode.
Two children that walk by Bishop have a new cartridge video game called Assassin. The picture on the cover resembles the Punisher (Frank Castle).
Wolverine refers to Bishop as "Mister Terminator", a reference to the Terminator character from the Terminator film series, who also travelled back in time from the future to kill somebody and alter the timeline.
The mutant file on the Sentinel scan for Bishop's card is 051063-241, the same as Jubilee's in the first episode.
The two teenage mutant rebels who assist future Wolverine on "the mission" at the beginning of this episode are a red haired girl who can fire white light energy from her hands, and a boy who can transform his arms into organic steel, seemingly giving him super strength.
Added by Galactico19

Added by Galactico19