- 19654 BC
- Thursday, January 8: Professor Marcus Irving, Marty, and Doc arrive from April 15, 1986.
- Unknown (Before April 15, 1986)
- Irving uses the flux capacitor in his car but fails to go to 88.
- Tuesday, April 15: A Marty robot severely beats up Douglas J. Needles with his right-hand also being beaten up. Doc and Marty arrives from their 1986. Marty reminds Doc that this is his fault so this is his responsibility.
- The robot tries to snap Needles' neck.
- Marty saves Needles, with Needles deserving an explanation. Marty tells him the robot is a distant relative.
- The robot tries to kidnap Marty.
- An alternate Marty saves Doc and Marty.
- Marty saves Doc from being run over.
- Professor Irving reveals that he created the robots.
- Marty disrespects Irving, saying he has aged and looked terrible.
- Marty learns that Irving knew about Doc's second DeLorean time machine and the flux capacitor. Irving reveals that Doc will recover. This creates Timeline 23, which begins at Doc, Marty, and Irving's entry point in 19654 BC and timeline 22 fades away.
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