Josh Brener

As a parasitic fungal outbreak begins to ravage the world, Joel Miller attempts to escape the escalating chaos with his daughter and brother; twenty years later, a now hardened Joel and his partner, Tess, fight to survive under a totalitarian regime.

Sheldon becomes jealous and considers taking his relationship with Amy to the next level when Stuart (guest star KEVIN SUSSMAN) from the comic book store asks her out on a date.

While the guys try to give their significant others the perfect Valentine's Day, Raj and Stuart throw a lonely people party at the comic book store.

A fight between Leonard and Sheldon drives Leonard to finally move in with Penny – not realizing how the shift will affect Penny and Amy's living arrangements. Meanwhile, Raj takes care of Mrs. Wolowitz while Howard is away.

Mitch, Cam and Phil crash Jay's annual hiking trip to find an elusive bald eagle after Gloria asks them to keep an eye on him; Gloria, Alex, Claire and Haley get together to plan her baby shower.