The following events occurred on October 25.
- About 8:23 AM - Marty McFly enters Doc's garage and turns on the CRM-114 amplifier.
- Due to a slight overload, he destroys the amplifier.
- Doc Brown calls and tells him to meet him at Twin Pines Mall at 1 AM, Saturday.
- Doc's clocks all chime at 8:25 AM.
- Marty rushes to Hill Valley High School and is tardy.
- Marty and his band The Pinheads audition for the Battle of the Bands.
- Marty gets Jennifer Parker's grandmother's number and plans to go up to the lake.
- Marty arrives home and sees the car wrecked by Biff Tannen
- George McFly watches The Honeymooners episode "The Man From Space".
- Lorraine announces that "Jailbird" Joey Baines failed to make parole again.
- Biff Tannen enters this time period from 1955 after stealing a new DeLorean time machine from IFT volunteers there attempting to fix the past.