Today on TV

Deal or No Deal (7 p.m., Ch. 5): First NBC vowed this game show would air only on Mondays, then it added a Friday edition. Then it added a Wednesday edition. And tonight's episode expands to two hours. Apparently, NBC execs learned nothing from the way ABC killed the "Who Wants to Be a Millionaire" golden goose.

Prison Break (7 p.m., Ch. 13): Flashbacks unveil what drove Michael to plan his brother's escape. Fox has ordered a second season.

7th Heaven (7 p.m., Ch. 30): Ruthie gets a new cell phone but no one calls her.

American Experience (8 p.m., Ch. 7): A profile of the racehorse Seabiscuit.

24 (8 p.m., Ch. 13): How are they going to top the explosion that ended last week's episode?

New Adventures of Old Christine (9:30 p.m., Ch. 2): Should Christine introduce her boyfriend to her son?