While making his son dig a swimming pool, Biff finds a deed that entitles the Tannen family to the land that became the Parker Ranch. With Biff ready to evict Jennifer and her family, Marty takes the boys back in time to find out the truth and fix the problem in the present day.
This episode includes examples of the following tropes:
- Abhorrent Admirer: Hephzibah Tannen becomes attracted to Marty, who doesn't respond to her advances.
- Absentee Actor: Doc and Clara don't appear in this episode, having taken the other time machine to 16th century England to watch the original version of Hamlet.
- Chained to a Railway: Thaddeus Tannen, who extorted the deed out of the Parkers, tied Genevieve Parker to the railroad tracks and insisted Wendell sign over their land to him before he'd untie her. After her husband signs it, Tannen runs off with the deed and leaves her tied up anyway.
- Guile Hero: Marty gives Wendell a pen to sign the deed, but it turns out to be full of disappearing ink.
- Ironic Name: Thaddeus' sister is named "Hephzibah", which means "My Delight is in Her." Marty doesn't find her attraction to him very delightful.
- Meaningless Villain Victory: Thaddeus Tannen still succeeds in getting Wendell Parker to sign over his land to him to save his wife, and he still manages to run off and bury the deed in the spot where Biff Jr. will find it in the present day. However, because Marty gave Wendell a pen full of disappearing ink, the signature doesn't show up and the Parkers keep control of the extorted land.
- Punny Title: The title refers to the phrase "A Friend in Need is a friend indeed", punning on the fact that the Parkers are having trouble with a property deed that says they don't legally own their land.
- Smooch of Victory: Jennifer kisses Marty for helping keep her family from being evicted.