NBC has tapped comedian Howie Mandel to host Deal or No Deal, an "exciting game show that contains nail-biting drama and hefty cash prizes," says the Peacock.... Actress Polly Bergen has signed on to play first mom to Geena Davis on Commander in Chief. She first airs Nov. 29.... The incomparable Charlotte Ross has been cast as John Stamos' ex-fiancée on ABC's Jake in Progress, which kicks off its second season in January. Oh, great. Now I have to start watching Jake in Progress. — Additional reporting by Ali Gazan