A Raisin in the Sun (7 p.m., Ch. 4): Sean Combs headlines the cast of this good new TV movie. The Moment of Truth (7 p.m., Ch. 13): In this very special Monday edition (pun intended), a young man is asked about his feelings about being Mormon, among other things. Welcome to the Captain (7:30 p.m., Ch. 2): Chris goes out on the town with Marty, Jesus and Uncle Saul. American Experience (8 p.m., Ch. 7): A profile of Buffalo Bill. Terminator: The Sarah Connor Chronicles (8 p.m., Ch. 13): Sarah locates doomsday convert Dr. Silverman. New Adventures of Old Christine (8:30 p.m., Ch. 2): Christine can't get to her date because she's stuck at Richie's soccer game. Medium (9 p.m., Ch. 5): Allison goes to work for an old nemesis a lawyer whose client turns out to be guilty.