Best Bets on TV tonight

“Lost” (9 p.m., ABC): We’ve come to expect strange things on “Lost,” but now we’re really flummoxed. Tonight, Allison Janney shows up as a mystery character identified only as “woman” in the credits. Your guess is as good as ours.

“Glee” (9 p.m., Fox): There’s big, big trouble on “Glee” when Rachel gets a — gasp! — sore throat. Naturally, it affects her singing voice, which plunges Rachel into a major panic and threatens to throw the Earth off its orbit.

TV Listings, B6