The cast of "American Dad."FOX - Friday, September, 25, 2009, 11:25 PM

Steve Smith (voiced by Scott Grimes) stars in American Dad on FOX. FOX/Seth MacFarlane - Wednesday, November, 15, 2006, 1:15 AM

Roger Smith (voiced by Seth MacFarlane) stars in American Dad on FOX. FOX/Seth MacFarlane - Wednesday, November, 15, 2006, 1:15 AM

Stan Smith (voiced by Seth MacFarlane) stars in American Dad on FOX. FOX/Seth MacFarlane - Wednesday, November, 15, 2006, 1:15 AM

Klaus Smith (voiced by Dee Baker) stars in American Dad on FOX.FOX/Seth MacFarlane - Wednesday, November, 15, 2006, 1:15 AM

Francine Smith (voiced by Wendy Schaal) stars in American Dad on FOX.FOX/Seth MacFarlane - Wednesday, November, 15, 2006, 1:15 AM

Hayley Smith (voiced by Rachael MacFarlane) stars in American Dad on FOX.FOX/Seth MacFarlane - Wednesday, November, 15, 2006, 1:15 AM

The Smith family: (L-R) Hayley, Stan, Steve, Francine, Klaus and Rodger FOX's American DadWednesday, September, 20, 2006, 9:20 PM

Stan returns home with the wrong thermos and believes he's exposed the family to hazardous material in the episode ?Threat Levels." FOX's American DadWednesday, September, 20, 2006, 9:20 PM

The Smith family: (clockwise) Stan, Rodger, Hayley, Klaus, Steve and Francine FOX's American DadWednesday, September, 20, 2006, 9:20 PM

The Smith family: (L-R) Rodger, Francine, Stan, Klaus, Hayley and Steve FOX's American DadWednesday, September, 20, 2006, 9:20 PM

Steve and the hottest girl in class, Lisa Silver (guest voice Carmen Electra) FOX's American DadWednesday, September, 20, 2006, 9:20 PM

Stan Smith FOX's American DadWednesday, September, 20, 2006, 9:20 PM