Martin becomes the blood brother of the race horse 'Sweet Sister' when a mosquito bites the animal after biting Martin.

Using his time machine, Martin brings Leonardo DaVinci into the present to help him with a mechanical problem.

Mrs. Brown steps in front of Martin's personality altecator and becomes a crook because of the book "The Criminal Mind" that was sitting next to the machine. Martin and Tim then have to keep up with her until they can give her the antidote.

In an effort to seem more important, Alvin boasts that he is working on a top secret project with Uncle Martin.

Tim is demoted to the Obituary column and he uses Uncle Martins time machine to try and get a big scoop. It backfires on him and he is blamed for a jewel robbery.

Honorary deputy Mrs. Brown becomes a zealous guardian of law and order after taking one of Uncle Martins pills.

Uncle Martin duplicates Tim by mistake when working on making parts for his spaceship.

Uncle Martin studies aging on Earth and meets two old ladies with a talent for larceny.

Uncle Martin rigs up a time machine and Detective Brennan messes with it and causes Uncle Martin and Tim to go back in time.