Tuesday on TV: Nancy Grace guest stars in hilarious episode of "Raising Hope"

If you haven't been paying attention, Raising Hope (8:30 p.m., Fox/Ch. 13) is one of the funniest shows on television.

And this week's episode accomplishes the impossible. It features Nancy Grace, and you don't want to change the channel instantly when you see her face. You know, the way you do when you see Grace on her own show.

Grace is doing a report on Hope's mother, Lucy, the serial killer. We not only get some new information about the relationship between Jimmy and Lucy, but there is a huge surprise at the end of the episode.

Really huge. Not kidding. But I can't tell you any more because I don't want to spoil it.

It leads into next week's episode, which is also hilarious.

The best news of all is that Fox has renewed "Raising Hope" for next season.

Elsewhere on TV ...

NCIS (7 p.m., CBS/Ch. 2): A Marine is missing in Colombia.

The Biggest Loser (7 p.m., NBC/Ch. 5): Michelle Obama talks to the contestants.

Glee (7 p.m., Fox/Ch. 13): Blaine's actor brother (Matt Bomer of "White Collar") visits.

NCIS: Los Angeles (8 p.m., Ch. 2): An ex-Marine is suspected of making a chemical bomb.

Cougar Town (7:30 p.m., ABC/Ch. 4): Ellie insists her mother (Susan Blakely) is a sociopath.

Dancing with the Stars (8 p.m., ABC/Ch. 4): Another pair is eliminated.

The Voice (8 p.m., NBC/Ch. 5): Contestants face elimination.

New Girl (8 p.m., Fox/Ch. 13): Jess invites Russell to spend the weekend in the loft.

Ringer (8 p.m., CW/Ch. 30): Machado learns who has been trying to kill Siobhan.

Unforgettable (9 p.m., CBS/Ch. 2): A conspiracy theorist has planted a series of bombs.

Body of Proof (9:01 p.m., ABC/Ch. 4): Megan comes face-to-face with a serial killer she helped put away. (Season finale)

Deadliest Catch (10 and 11 p.m., Discovery): In the season premiere, the captains come to grips with a slashed crab quota.

Justified (11 p.m., FX): In the season finale, Raylan is headed for a bloody showdown.