Mr. Lundy is the dorky Medford High School drama teacher who gave up on his dream of becoming a famous actor. We know, what a cliché. He's also a sports guy — aka he coaches the girls' volleyball team, a gig he can't help but deem "the real drama class." Try and hold your eye-rolls. He's bragged about being "a professional actor for years and years," despite only landing parts in local Mattress Madness commercials.

We first meet Mr. Lundy in Season 1, Episode 16, titled "Killer Asteroids, Oklahoma, and a Frizzy Hair Machine," after Sheldon shockingly loses the school science fair. Greatly disappointed in himself, the boy genius loses his passion for science and decides to try his hand at the performing arts. Mr. Lundy takes Sheldon under his wing, showing him the ropes of acting.

Hilariously, the episode showcases both Mr. Lundy and Sheldon tap-dancing as the brainy boy sings "I Got Rhythm" from the musical Girl Crazy. In fact, little Iain Armitage tap-dances in real life!