Theo is an articulated doll by Heidi Ott. He's one of the early model males, which makes him shorter, less buff, and his feet are wide and flat.

I acquired Theo while I was watching Highlander DVDs, so he got the 'immortal' backstory. (Pity he didn't get the looks!) He was buried in a church about 1900 by suspicious men, and discovered by Robin in the early 21st century on a dig. Eventually he convinced her that it wasn't an elaborate prank, and he really was long-lived. Now he's adjusting to 21st century life and following Robin around.