My Favorite Martian: The Original Series

Go West Young Martian, Go West (Part 1)
Martin has invented a suitcase-styled time machine and when Detective Brennen absently hits a switch, Tim and the Martin are sent back to St. Louis Missouri in 1849, with no way to get back to 1965.

Go West Young Martian, Go West (Part 2)
Joining a wagon train to get to California in 1949, Martin and Tim must contend with two crooks that stole their map to the location of the time machine.

Martin Meets His Match
Martin uses his time machine to bring Leonardo Da Vinci to the apartment so that he can consult with the great inventor on fixing his spaceship.

Pay The Man The 24 Dollars
Returning from researching New Amsterdam of 1626 via the time machine, Tim discovers he inadvertently changed history by having a hand in the sale of Manhattan Island to the Dutch.