BEST BETS
• Dahlia (guest star Claudia Black) tries to win Klaus over to her side on a new The Originals, dangling information about baby Hope in front of him. Several others are seeking their own ways of dealing with the crafty witch, too. (CH 15, CW 32 at 8; KTLA at 11)
• When Mike meets his aunt Rosemary (Emmy winner Margo Martindale, The Millers, reprising her guest role) for the first time, he is stunned by how different she is from her sister, Peggy, on a new episode of Mike&Molly. (City 44, CBS 39 at 8:30)
• On a new episode of Bates Motel, Romero confronts Norma about some information that recently came to light, while an increasingly fragile Norman is devastated by a new discovery. Emma makes a decision about her future with Norman. (A&E at 9 & 11:01)
• More than 30 years after a girl suffered a fatal fall at her posh school, UCOS reopens an investigation into her death after a time capsule is unearthed that contains a cassette recording that may hold a clue on a new New Tricks. (TVO at 9)
• Cutler is drawn into a critical case when a husband and wife can’t agree on treatment after she goes into toxic shock on a new Remedy. Mel dismisses Dylan’s protestations of innocence when she catches him in an illicit activity. (Global at 9:01)
• Talk about unexpected turbulence: Alexis and Castle’s father-daughter flight to London is unceremoniously interrupted when an air marshal on board is murdered during the journey on a new episode of Castle. (CTV at 10; ABC 38 at 10:01)
LATE NIGHT
Stewart at 11 & 12:05. Fallon at 11:34: Robert Downey Jr., Fran Lebowitz, Zac Brown Band performs (N). Letterman at 11:35 & 1: Scarlett Johansson, John Mellencamp, Todd Rundgren sits in with Paul Shaffer & The CBS Orchestra (N). Kimmel at 11:35 & 12. Conan at 12:30 & 1:37: Actor Cedric the Entertainer, journalist Fareed Zakaria, singer-songwriter Marina & the Diamonds (N). Meyers at 12:36& 12:37: James Spader, Jane Krakowski, The Wombats perform, Jack Antonoff sits-in with The 8G Band (N). Daly at 1:37.