By Tom Gliatto Liza Hamm Paul Chi Lisa Ingrassia
April 30, 2007 12:00 PM

NBC (Wednesdays, 8 p.m. ET)


A weekly hour of improv sketch comedy? The red hand on the excite-o-meter stirs a little, as if considering a salute, then falls motionless. But Thank God, which started as an Australian show, is innocently goofy, and at least we can be thankful for that. David Alan Grier serves as host, and Dave Foley (NewsRadio) is judge of who among that week’s four performers will go home with a cheap trophy crafted (as he puts it) “in shatterproof plastic by the Franklin Mint.” During the debut episode, I laughed when Jennifer Coolidge, the only actress who can look voluptuous and panic-stricken at the same time, was thrown into a sketch about international beauty contestants. Asked to name one thing she’d rid mankind of, she answered, “I never liked dry ice.”