Guest Star: Hermie Castillo
The Planetarium Collision
Season 12, Episode 5 - Aired October 18, 2018
When Sheldon feels that Amy's job isn't leaving her enough time to work with him on super-asymmetry, he goes behind her back and unwittingly sabotages her career in the process. Meanwhile, Raj is unhappy at the prospect of Howard joining him in hosting a show at the planetarium.
Appeared as Colin