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, episode The Romance Resonance, the plans Howard Wolowitz has to celebrate the anniversary of his first date with his microbiologist wife, Bernadette Rostenkowski-Wolowitz, 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, Sheldon, Penny, Raj and Amy singing backup.

You can order the song off of iTunes today: CLICK HERE

The cast recording of the song, distributed by WaterTower Music, features Simon Helberg singing lead with Johnny Galecki, Jim Parsons, Kaley Cuoco, Kunal Nayyar and Mayim Bialik providing backing vocals. "If I Didn't Have You (Bernadette's Song) [MusiCares version]" can be downloaded on iTunes now, in recognition of the show's support of MusiCares®.

"If I Didn't Have You (Bernadette's Song)" was written by comedian, singer-songwriter and The Big Bang Theory recurring guest star Kate Micucci (who played Raj's ultra-shy ex-girlfriend Lucy) and her music partner Riki Lindhome, who perform as the comedy folk duo Garfunkel and Oates.