Best of the night: A new "My So-Called Life" (who knows how many more of those there'll be?) and an old "Seinfeld" to be treasured, especially by fans of Teri Hatcher of "Lois & Clark: The New Adventures of Superman."
* "Mad About You" (8 p.m.-8:30 p.m., 9:30 p.m.-10 p.m., Channel 2) -- The repeat episodes tonight are more noteworthy for when they're broadcast than for what they contain. The first episode is shown during this mature comedy's regular, and too early, time slot at the beginning of NBC's Thursday lineup. The second comes after "Seinfeld," pre-empting "Madman of the People." NBC.
* "My So-Called Life" (8 p.m.-9 p.m., Channel 13) -- In this first-run Christmas episode, Juliana Hatfield is the guest star as Joy -- and if you don't know who she is, ask your kids, for whom this series is tailor-made anyway. Even so, it's one of my favorites, too, and tonight's plot borrows a somber real-life chapter from the life of Wilson Cruz, who co-stars as Rickie. Claire Danes stars as Angela. ABC.
* "Seinfeld" (9 p.m.-9:30 p.m., Channel 2) -- When Teri Hatcher first appeared before TV critics to promote the then-new "Lois & Clark," she was asked why she seemed so familiar. Ms. Hatcher replied that she had guest-starred on a "Seinfeld" episode critics may have seen -- and when they pressed her for details on which episode, she finally replied, somewhat warily, that it was the "breasts" show. Remember the sauna scene with Elaine (Julia Louis-Dreyfus)? Either way, this is a riot. -- and it does display the sexy yet comedic touch that doubtlessly won Ms. Hatcher the Lois Lane role. NBC.
* "Nothing Sacred" (9 p.m.-10:20 p.m., AMC) -- Here's a neat double feature from American Movie Classics. It begins with this 1937 screwball comedy, starring Carole Lombard as a woman who pretends she's dying in order to experience a gala time in New York . . .
* "Living It Up" (10:30 p.m.-12:10 a.m., AMC) -- . . . And it ends with this 1954 remake, with the Lombard character played by -- ready? -- Jerry Lewis. Dean Martin co-stars; so does Janet Leigh.