May 15th is the 135th day of the year.
- 1986, Thursday (Sometime after 12:00 PM): Marty and Doc return from 1931, where they discover that they have altered the timeline since they stopped Edna from burning down Hill Valley in 1876, and got her arrested. They discover Edna is married to Kid and are about to go into Doc's garage only to be visited by three future counterparts to Marty (Each with a different Delorean).
- 1986A, Thursday (8:32 a.m0: Marty & Doc return from 1931 to find that they have arrived in an alternate timeline, where Hill Valley is ruled by the Tannen Crime family. They subsequently depart for 1931 once more.
- 1986B, Thursday (2:15 p.m): Marty returns from 1931, only to crash the DeLorean into a billboard, find that Doc has vanished, and that he is in, yet again, an alternate timeline. This leads Marty to:
- Convince an alternate Jennifer to help him out of the crashed DeLorean
- Talk to several people about the alternate timeline
- Do three things to get in trouble, in hopes of seeing Citizen Brown (Alternate Doc):
- 4:10 p.m.: Marty has an interview with Citizen Brown, in hopes of convincing Brown that he is from alternate timeline, and that everything is messed up (ala, Brown should be a scientist, not a mayor). The interview is unsuccessful.
- 4:30 p.m: Alternate George cleans the playback heads of his tapes, and is attacked by a brain-washed alternate Biff shortly there-after.
- 5:03 p.m.: Marty confronts Biff, leading him to finding Edna's lair, where he fights a brain-washed Biff, and confronts Edna about what she's doing with the Citizen Plus Program. Citizen Brown finds them, and is furious with Edna, and is ashamed of what he has allowed to happen. This leads to Marty being able to convince him that he is telling the truth, and Brown agrees to go along with his plan. However, both Marty & Brown are soon captured by Edna.
- 1986D, Thursday: Emmett (who is an industrialist) and Edna Brown have divorced, with Edna displaying verbal abuse to him.
- Back to the Future: The Game
- Back to the Future (IDW Publishing)
- Edna mentions to taking Einstein on his afternoon walk.
- Back to the Future: Citizen Brown #1
- The time is shown if you look at "The Story So Far" before going to the door.
- George says 5:30, but the time shown on Story Thus Far shows you at the garage at 4:36 PM.
- Mentioned if you look at the newspaper before saving Emmett on the clocktower in Back to the Future: The Game - Episode 4: Double Visions.
- Shown in the newspaper before Emmett's invention is presented. A close up is available if shown to the fake Jacques Douteux.