With Annie out of town, Eric is left alone to accompany Simon on his visit to the Board of Education to discuss early graduation. During the meeting, Simon bonds with his advisor, Maynard (guest-star Cirroc Lofton), when they realize that they're both preachers' kids. Meanwhile, Lucy catches Chandler kissing a beautiful blonde woman at church and she agonizes over whether or not to tell Roxanne; Kevin's (George Stults) boss, Detective Michaels (guest-star Christopher Michael), tricks him into babysitting his six-year-old granddaughter; Peter makes a deal with the school bully in an attempt to protect Ruthie and Cecilia agrees to watch the twins which leads to a confrontation with Simon.

The crew encounters some ships, the remainders of the Commonwealth Fleet. The leaders went into hiding when the fighting broke out. They need to find them to restore order to the Commonwealth.

This two-part Las Vegas episode featured six contestants competing in six stunts. The winner would have to bet half their winnings on a hand of blackjack.

The entire Abbot's family is turned upside down by the return of Dr. Linda Abbott (Marcia Cross, "Melrose Place"), who has been practicing Eastern-based medicine in exotic locations around the world. Edna, who is blinded with pride, doesn't see her daughter's loneliness, and loses sight of her own life with Irv. But Linda encounters the most resistance from her brother Harold when she announces her decision to join his practice. Meanwhile Andy learns that some 'tweens may be practicing unsafe sex, and is shocked at their parents reaction to the situation. Finally, Bright asks Ephram to keep an eye on Amy whose odd behavior has everyone worried.

Charlie begins to learn how to parent Jake while Alan attempts to get Judith back.

The body of a man involved in recovering sunken treasure is discovered pinned to the wall of his new cabin cruiser by a bloody spear fired from a speargun at close range.

Danny receives bad news when he finds out that his friend Greg is the mysterious dead body in the desert. Ed gets a visit from Senator Bill Henderson, an outspoken conservative. He goes on record fighting against casinos yet makes regular trips to the Montecito. There is also a reporter hot on the Senator's trail. Danny must stop him from exposing the Senator's true self. A crazy King Arthur impersonator shows up to perform at the Montecito.

Guest: Jack Black (The School Of Rock)

Segments: Democrats 2004: Race From The White House (The CNBC Debate)

Rob Corddry (Corddry at The CNBC Debate)

Stephen Colbert's Interviews I Could Get (Reverend Al Sharpton)