Fall TV Preview: 'The Crazy Ones'

This fall, CBS's The Crazy Ones delivers a one-two punch of comedy as Oscar winner Robin Williams returns to network TV (it's been more than 30 years since Mork & Mindy was on the air) alongside Sarah Michelle Gellar in her heralded return to the small screen after big-screen roles and motherhood duties following Buffy the Vampire Slayer. Playing a father- daughter team that runs a Chicago ad agency, their chemistry both onscreen and off is palpable, evident by their riffing for ETonline. Watch and enjoy…

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"It's been sweet since day one because I think we both admitted being afraid walking in," says Williams of coming back to TV after three decades.

"I kept thinking I was going to get fired," says Sarah. "I still probably think that daily."

As employees at the ad agency, Mad Men star James Wolk and Gossip Girl's Amanda Setton are also on-hand to do their best not to laugh at Williams' antics as larger-than-life advertising genius Simon Roberts, whose unorthodox methods and unpredictable behavior would get him fired -- if he weren't the boss. Gellar is Sydney, the exact opposite personality of her dad -- focused, organized and eager to make a name for herself, but also too busy parenting her father. With his team working with him, Simon sets the advertising world on fire – even if they are The Crazy Ones.

Related: ET's Complete Fall TV Preview

Also starring Hamish Linklater, The Crazy Ones premieres Thursday, September 26 at 9/8c on CBS.