After Tim is infected with—then cured from—a Martian disease, Uncle Martin takes him home from the hospital. A missing scene from the Season 3 episode "Virus M for Martian," taking place between the doctor dismissing Brennan's account of Tim's malady and Brennan showing up at the O'Hara apartment later that night to apologize. [Cross-posted on AO3.]

Uncle Martin wants to pay his way and Tim gets to see another of Uncle Martin's talents.

The pilot of My Favorite Martian told through Exigius 12 1/2, aka Uncle Martin's point of view.

Martin O'Hara gives his nephew, Tim, a history lesson.