Critic's corner

Swingtown 10 p.m., Channel 4
Last week, Susan and Bruce agreed they wouldn't swap spouses again. But, well, I'm not so sure they're sure about that. And in tonight's episode, they get a taste of Trina's fondue, which may prove irresistible. This show has the potential to be a fascinating look at monogamy, not unlike "Big Love." But, alas, so far it has been mediocre, with flat characters and far too much 1970s kitsch.

Dana Carvey: Squatting Monkeys Tell No Lies10 p.m., HBO
Botox much?

Grey's Anatomy9 and 10 p.m., Channel 5
Denny's death, from 2006. Back when the material warranted Heigl's respect.

Martha Behind Bars 8 p.m., Lifetime Movie Network
Line up, ladies, for origami instruction.

Fear Itself 10 p.m., Channel 7
Colin Ferguson from "Eureka" plays a guy who's in a car accident and winds up switching bodies with a jailed serial killer. His family welcomes the serial killer home from the hospital, unaware that he's a wolf in sheep's clothing. OMG! "Eureka," by the way, will be back on Sci Fi on July 29.

Live From Abbey Road 10 p.m., Sundance Channel
Oh. Blige.

Biography 9 p.m., Biography Channel
Willie Nelson, token cowboy.

Comcast, Max

Robin Williams is a divorced father who masquerades as a nanny to hoodwink his ex and spend more time with his three kids - who reverse roles with their nominally adult parents. Williams's verbal invention is more fun than the physical comedy (especially when he tries to break up his ex's new romance), but a sappy script keeps this outing from being as wild as it might have been. (PG-13; runs through June 25)