The Big Bang Theory: Watch Season 8 Episode 17 Online

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Another Thursday night, another strong installment of The Big Bang Theory.

On The Big Bang Theory Season 8 Episode 17, a half hour titled "The Colonization Application," Amy discovered that Sheldon had applied for a one-way mission to Mars.

As you can imagine, she wasn't too thrilled about where that left her.

Elsewhere, Leonard surprised Penny with an “adult” purchase; while Raj got caught snooping in Emily’s apartment.

Yes, we said an adult purchase. Is your interest piqued yet?!? Go ahead and watch The Big Bang Theory online right here and right now to find out what it was.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.

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The Big Bang Theory Season 8 Episode 17 Quotes

Penny: See, this is why I've been saying we should keep champagne on ice.
Sheldon: Sarcasm?
Amy: Yes.
Sheldon: That was tricky because when it comes to alcohol she generally means business.

Amy: After a careful evaluation of our relationship. We decided that the time was right to take a step forward.
Leonard: Okay.
Sheldon: Do you want to say it?
Amy: Let's say it together!
Sheldon and Amy: We're getting a turtle!