Highlights from the Seventh Episode of Season 5 of The Big Bang Theory

A cute comic book artist puts Leonard (Johnny Galecki, right) and Priya's relationship to the test, while Sheldon tries to scare the guys for Halloween, on THE BIG BANG THEORY. Also pictured: Kevin Sussman (left), Simon Helberg (center).

A cute comic book artist puts Leonard (Johnny Galecki, right) and Priya's relationship to the test, while Sheldon tries to scare the guys for Halloween, on THE BIG BANG THEORY. Also pictured: Kevin Sussman (left), Simon Helberg (center).

A cute comic book artist puts Leonard and Priya's relationship to the test, while Sheldon (Jim Parsons) tries to scare the guys for Halloween, on THE BIG BANG THEORY. Photo: Monty Brinton/CBS

A cute comic book artist puts Leonard and Priya's relationship to the test, while Sheldon (Jim Parsons, second from left) tries to scare the guys (Kunal Nayyar, second from right; Simon Helberg, right) for Halloween, on THE BIG BANG THEORY. Photo: Monty Brinton/CBS

A cute comic book artist puts Leonard and Priya's relationship to the test, while Sheldon (Jim Parsons) tries to scare the guys for Halloween, on THE BIG BANG THEORY. Photo: Monty Brinton/CBS

Sheldon's screams...when he's scared! Check back for new additions to the funny faces album!

- A cute comic book artist puts Leonard (Johnny Galecki, center) and Priya's relationship to the test, while Sheldon (Jim Parsons, left) tries to scare the guys for Halloween, on THE BIG BANG THEORY. Also pictured: Kaley Cuoco, right. Photo: Monty Brinton/CBS