What to Watch Tuesday: NCIS turns 300

Your daily guide to the most interesting stuff happening on TV and streaming. All times Eastern.

PICK OF THE NIGHT
NCIS
CBS, 8 p.m.
The series airs its 300th — 300th! — episode on Tuesday, so you better believe it’s celebrating with a bang. This one’s got everything: guest star Taye Diggs playing a Marine gunnery sergeant, Laura San Giacomo reprising her role as Grace Confalone, and even a special performance from the MusiCorps band. I hope they all bought Mark Harmon a cake!

TTYL, PLL
Pretty Little Liars
Freeform, 8 p.m.
The season finale has the Liars desperately trying to uncover Über A’s true identity, and even offering up Hanna as bait. I hope I’m not my friend group’s Hanna?

THOSE CRAZY MILLENNIALS
Crowded
NBC, 10 p.m.
This new sitcom stars Patrick Warburton (a.k.a. Puddy from Seinfeld) and Carrie Preston (who won an Emmy for her turn on The Good Wife) as parents whose millennial daughters (played by Miranda Cosgrove and Mia Serafino) move back home after college. As it happens, I’m writing this blurb from my mother’s house right now. Just kidding! I’m actually in Patrick Warburton’s basement, don’t tell him.

THOSE CRAZY MILLENNIALS, PT. II
Awkward.
MTV, 10 p.m.
In a similar generational theme, this popular MTV comedy returns for its spring premiere on Tuesday. The show drops in the beginning of summer: Jenna is heading into an exciting fellowship at an Internet startup while also reconnecting with her high school friends. Sounds like she’s already way ahead of those lazy Crowded kids!