PARKS AND RECREATION -- Chris, April and Leslie attempt to put together a haunted house while they await recall election results. (Colleen Hayes/NBC)

Sheldon continues to overreact after a past slight involving Leonard comes to light on “The Big Bang Theory” (CBS at 8 p.m.), and as punishment, Leonard must walk a mile in Sheldon’s shoes. Literally.

Katherine receives some disturbing news and Jeremy and Bonnie gain some hope after talking with Amara on “The Vampire Diaries” (CW at 8). At the same time, Stefan makes a heartbreaking confession to Damon and Elena, and Damon turns to Tessa for some help with his new plan.

After Leslie plans an over-the-top ‘90s-themed birthday party for Ben the only way she knows how, she is forced to leave the bash and attend an emergency late-night filibuster on the night’s first “Parks and Recreation” (NBC at 8 and 8:30). The second P&R episode has Leslie facing a recall election as she prepares a haunted house with Ben, Ann and Chris. And when sales plummet, it starts to look like Tom’s Rent-a-Swag days are numbered.

After we find out Callie is being served with a malpractice suit on “Grey’s Anatomy” (ABC at 9), she turns to her dad who divulges a secret to her. A series of flashbacks reveals some unexpected details about Callie and Arizona’s courtship.

RETURNING SHOW: “Braxton Family Values” (We tv at 9) returns for the second part of its third season with plenty of Braxton sister drama when Traci, also known as “The Wild One,” finds out that her husband might have had a secret love child years ago.

The designers of “Project Runway All Stars” (Lifetime at 9) are asked to create clothing from elementary school supplies in an unconventional materials challenge. Michael Urie and Gabourey Sidibe are guest judges.

Huck tries to create distance between himself and Quinn, and Mellie seeks a certain interview to boost her public image on “Scandal” (ABC at 10). Flashbacks reveal how Fitz, Mellie and Cyrus first came together.

SERIES PREMIERE: The new workplace comedy from Bill Lawrence, “Ground Floor” (TBS at 10), follows a young, hot-shot banker (played by Skylar Austin) as he falls for a cute girl who works in his building’s maintenance department.

Actors Claire Danes and Will Forte come to “The Late Show With David Letterman” (CBS at 11:35), with a musical performance from Metric.

Comedian Craig Ferguson is on “The Tonight Show With Jay Leno” (NBC at 11:35), with musical guests JRand featuring Flo Rida.

Comedian Sarah Silverman and magician David Blaine join “Jimmy Kimmel Live” (ABC at 11:35), with a musical performance from Charlie Wilson.

— Rachel Lubitz