NBC’s midseason plan features a mix of shows familiar and new.

The Peacock network has announced that two of its summertime sleeper successes, the hospital drama The Night Shift and the relationship comedy Undateable, will return at midseason.

Specifically, Night Shift will open Season 2 on Monday, Feb. 23 at 10/9c (leading out of The Voice’s two-hour Season 8 opener), while Undateable’s sophomore run will air Tuesdays at 9 pm, starting March 17. (Both shows’ first seasons ran May to July.)

NBC’s other midseason moves include:

* Allegiance, a contemporary espionage-at-home drama in the vein of The Americans — about a young CIA analyst whose parents are former-ish KGB — will premiere Thursday, Feb. 5 at 10 pm, leading out of The Blacklist (which moves to its new night following a Feb. 1 post-Super Bowl showcase).

* The eight-episode miniseries The Slap premieres the following Thursday, Feb. 12, at 8 pm. Peter Sarsgaard, Uma Thurman, Thandie Newton, Melissa George, Zachary Quinto and Thomas Sadoski star.

* One Big Happy, a comedy from writer Liz Feldman and executive producer Ellen DeGeneres, debuts Tuesday, March 17 at 9:30, leading out of Undateable. Elisha Cuthbert, Nick Zano and Kelly Brook star. (Marry Me and About a Boy will resume their seasons at a date TBA.)

* On Easter Sunday aka April 5, A.D. (a follow-up to History’s The Bible, looking at the lives that were instantly altered following the death of Christ) and Odyssey (a Traffic-like drama about an international conspiracy that connects three strangers’ lives) will bow, at 9 and 10 pm, respectively.

A.D. stars Greta Scaachi as Mother Mary, Richard Coyle as Caiaphus, Vincent Regan as Pilate, Adam Levy as Peter, Chipo Chung as Mary Magdalene and Juan Pablo Di Pace as Jesus. The Odyssey cast includes Anna Friel, Peter Facinelli and Jake Robinson.