Cast of BIG BANG THEORY Sings Original Song, Now Available on iTunes

Ba-sing-a! The Big Bang Theory is getting musical with the release on iTunes of an original song performed by the cast.

In the Thursday, October 24 (8/7c), episode "The Romance Resonance," the plans Howard Wolowitz (Simon Helberg) has to celebrate the anniversary of his first date with his microbiologist wife, Bernadette Rostenkowski-Wolowitz (Melissa Rauch), are thwarted when a lab incident leaves her temporarily quarantined.

In a romantic gesture, Howard performs the original song "If I Didn't Have You (Bernadette's Song)" outside her hospital room, with his friends Leonard (Johnny Galecki), Sheldon (Jim Parsons), Penny (Kaley Cuoco), Raj (Kunal Nayyar) and Amy (Mayim Bialik) singing backup.

Leonard and Sheldon are brilliant physicists - geniuses in the laboratory, but socially challenged everywhere else. Enter beautiful, street-smart neighbor, Penny, who aims to teach them a thing or two about life. Despite their on-again, off-again relationship in the past, Leonard believes he's found true love with Penny. Even Sheldon has found a female companion, entering into a "Relationship Agreement" with neurobiologist Amy Farrah Fowler. In their free time, Leonard and Sheldon continue to enjoy frequent trips to the comic book store and fantasy role-playing games with their ever-expanding universe of friends, including fellow scientists Koothrappali, Wolowitz and Wolowitz's adorable microbiologist wife, Bernadette.

Photo: Michael Yarish/CBS

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