How to Rock (8pm, Nickelodeon) - Gravity 5 sneak into a Cee Lo concert, and Cee Lo winds up inviting Kacey to tour with him. However, her impending absence leaves her band with no lead singer for the Battle of the Bands competition.

My Cat From Hell (8pm, Animal Planet) - Jackson Galaxy helps a couple whose cat eats everything, forcing them to employ childproofing tactics in their home. "Wow, that's weird," said the TV blogger with a pillaging cat and locked cabinets.

The Timey-Wimey of Doctor Who (9pm, BBC America) - The concept of time in "Doctor Who" is explored. "The Nerdist" at 10 p.m. continues the theme with a tribute to time travel.

Smart Cookies (9pm, Hallmark) - A sweet Hallmark movie about Girl Scouts. Adrienne has a review.

Tanked (9pm, Animal Planet) - A man-cave aquarium for NFL's Bart Scott, and a vault tank for a Florida technology company.

Wedding Impossible (10pm, Food) - Chef Robert Irvine plans his own Napa Valley wedding to pro wrestler Gail Kim.

Dark Matters: Twisted But True (10pm, Science) - The Stanford prison experiment is detailed, as is a dentist's plot to bomb Japan.