Big Bang Theory season 7 episode 3: How to watch online "The Scavenger Vortex" [CBS start time, promo video]

"The Big Bang Theory" season 7 episode 3 will air tonight on CBS at 8 p.m. ET.

The official synopsis for episode 3 titled "The Scavenger Vortex" is as follows:

"When the entire gang competes in a scavenger hunt designed by Raj, it brings out the best – and worst – in everyone."

The promo clip features Sheldon screaming, "My brain is better than everybody!"

Last week's premiere saw two episodes - "The Hofstadeter Insufficiency" and "The Deception Verification."

A whopping 20 million viewers tuned in to watch the season premiere –breaking the show's previous records.

For those who missed the first two episodes of "The Big Bang Theory" season 7, catch up and watch the full episodes online via live stream on the CBS website.

If you miss tonight's episode, be sure to watch it later online.

Watch the promo clip for "The Scavenger Vortex" below:

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