House, Dane Cook on Hawaii Five-0, and a Pretty Little Liars marathon

1 p.m., ABC Family

Pretty Little Liars

Spend your President’s Day watching a seven-hour PLL marathon! And then, after that, watch tonight's new episode: At 8 p.m., Aria (Lucy Hale) and Ezra (Ian Harding) bond during the school play while the rest of the girls stress out over trying to learn more about Alison’s murder.

8 p.m., FOX


House (Hugh Laurie) decides to participate in Career Day at a local school, and he ends up sharing medical secrets with the students and getting relationship advice from a couple of fifth-graders.

9 p.m., CW

Gossip Girl

It’s a happy day for Eric (Connor Paolo), who's celebrating his 18th birthday—but it's a confusing day for everyone else. Serena (Blake Lively) can’t decide between her family and Ben (David Call), Blair (Leighton Meester) is facing some tough career choices, and Chuck (Ed Westwick) distances himself from Lily (Kelly Rutherford).

10 p.m., ABC


In the first installment of this two-part episode, Castle (Nathan Fillion) and Beckett (Stana Katic) investigate the murder of a cab driver who was involved a messy conspiracy theory, and a hard-ass federal agent (guest star Adrian Pasdar) steps in to help out the precinct.

10 p.m., CBS

Hawaii Five-0

Danny (Scott Caan) receives a visit from his younger brother, Matt (guest star Dane Cook), who is actually the target of an FBI investigation. Plus, Steve (Alex O’Loughlin) tracks a bomber who's seeking revenge.

Also on the airwaves...
The Bachelor, 8 p.m., ABC
How I Met Your Mother, 8 p.m., CBS
Chuck, 8 p.m., NBC
90210, 8 p.m., CW
Mad Love, 8:30 p.m., CBS
The Chicago Code, 9 p.m., FOX
The Cape, 9 p.m., NBC
Greek, 9 p.m., ABC Family
Intervention, 9 p.m., A&E;
Top Gear, 9 p.m., BBC America
Bad Girls Club, 9 p.m., OXYGEN
Being Human, 9 p.m., Syfy
Cake Boss, 9 p.m., TLC
Mike & Molly, 9:30 p.m., CBS
Harry’s Law, 10 p.m., NBC
Heavy, 10 p.m., A&E;
Tabatha’s Salon Takeover, Season 3 finale, 10 p.m., BRAVO
Skins, 10 p.m., MTV
19 Kids and Counting, 10 p.m., TLC
NHL Hockey: Capitals v. Penguins
NCAA Men’s Basketball: Syracuse v. Villanova, Georgia v. Tennessee, Arkansas Pine Bluff v. Prairie View A&M;, Oklahoma State v. Kansas, Maryland Eastern Shore v. Morgan State
NCAA Women’s Basketball: Georgia v. Tennessee, Texas v. Iowa State

What are you watching tonight?

Follow writer Stefanie Lee on Twitter: @StefAtTVDotCom

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