What To Watch: Vikings Returns, Bye Spy, Craig Ferguson's Back And More

On TV this Thursday: Vikings forms a new partnership, Mom plans a Cheers-ful wedding, Broke Girls boomerang and Craig Ferguson returns to late night. Here are 10 programs to keep on your radar:

Showtimes for February 18, 2016

ET

Grey's Anatomy

ABC

Callie and Maggie proceed with a risky surgery on Alex's teen patient despite his professional opinion; Meredith's recovery continues. (Watch sneak peek.)

You, Me and the Apocalypse

NBC

Jamie and Dave retrieve information on Ariel's whereabouts from his birth mom; Father Christophe is appointed by the Vatican to assist Jude and Celine.

ET

The 100

The CW

Clarke's wish for peace is jeopardized by an emerging threat; Raven becomes a target; Murphy proceeds with a dangerous con.

Mom

CBS

Christy and Bonnie plan Marjorie's wedding to Mr. Perugian; Rhea Perlman (Cheers) guest-stars. (Watch the cast's drug addiction PSA.)

ET

2 Broke Girls

CBS

New/old time slot alert! Caroline's life story grabs the attention of a Hollywood studio exec; Sophie and Oleg look for a surrogate. (Where's Angel From Hell?)

ET

Colony

USA Network

Will, Katie and Proxy Synder are trapped in the Yonk amid a Resistance operation, putting their allegiance to the ultimate test.

Elementary

CBS

Sherlock and Joan investigate the murders of a botanist and his students killed with poisonous 'shrooms; Joan butts heads with her neighbor (Gotham's Richard Kind). (Get scoop.)

London Spy

BBC America

Miniseries finale: Danny learns what really happened to Alex and what took place in the attic on the night of his death.

Vikings

History

Season 4 premiere: Events beyond Ragnar's control unfold as he remains sick in Kattegat; Kalf and Lagertha announce a joint Earldom. (Watch trailer.)

ET

Join or Die With Craig Ferguson

History

Series premiere (two episodes): Ferguson returns to late night for a weekly half-hour panel discussing history's greatest triumphs and fiascos. First up, Jimmy Kimmel stops by to chew over the biggest political blunder. Then at 11:30 pm, Chris Hardwick diagnoses history's worst-ever medical advice.

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