There's new show Pretty Little Liars: The Perfectionists, the return of vampire mockumentary What We Do in the Shadows and Glenn Howerton’s AP Bio, The Great British Bake Off and more . . .
Pick of the Day
Pretty Little Liars: The Perfectionists, 11.00pm, RTÉ2
Here’s an American crime drama - a sequel to the star-studded Pretty Little Liars - following the lives of a group of young students in the town of Beacon Heights, where everything is not as it seems.
Set a few years after the events of Pretty Little Liars, three college friends struggle with the stress of being overachievers.
Meanwhile, Alison DiLaurentis and Mona Vanderwaal have left Rosewood to travel to Beacon Heights for a fresh start with their careers and families.
When a murder occurs at the prestigious Beacon Heights University - where excellence is a requirement - everyone is put on edge.
The seemingly perfect town may not be so perfect after all.
Don’t Miss
British Sitcom: 60 Years of Laughing at Ourselves, 9.30pm, BBC Four
After a triple treat of episodes of The Good Life, One Foot in the Grave and The Royle Family, this documentary nicely rounds off sitcom Tuesday on BBC Four.
It’s a journey through the history of the British TV sitcom, from Hancock's Half Hour in the 1950s to present day shows.
It also reveals the inspiration behind some of the most enduring characters and how comedy has reflected changing attitudes in society.
Narrated by Rebecca Front (above), it features contributions from writers and actors including Steve Coogan, Richard Curtis, James Corden, Graham Linehan, Dick Clement and Ian La Frenais.
The Great British Bake Off, 8.00pm, Channel 4
It's sticky fingers all-round as Noel Fielding and Matt Lucas present as the bakers put their twist on a classic caramel tart.
Then they’ve to produce a family favourite biscuit bar in the technical, before creating a showstopping dessert encased in a sugar dome.
Paul Hollywood and Prue Leith judge their efforts, deciding who will win star baker and who will be heading home.
Designed for Life, 8.30pm, RTÉ One
Arlene McIntyre's latest challenge is a Victorian home in Dublin with two reception rooms, and owner Patricia is very keen that the design maintain their period charm.
Impeachment: American Crime Story, 9.10pm, BBC Two
The Clinton impeachment tale starring Sarah Paulson and Beanie Feldstein continues.
It's 1997, and Linda disconcerts Monica when she decides to make her voice heard.
Meanwhile, the Supreme Court is unanimous in permitting Paula's lawsuit to continue. Clinton must consider settling the case, which is not something his opponents want to see happen.
New or Returning Shows
What We Do in the Shadows, 10.05pm, BBC Two
Return of the often hilarious vampiric mockumentary, starring Matt Berry, Kayvan Novak and Natasia Demetriou, that’s basically a New York-based version of the New Zealand film of the same name.
As season three begins, the fate of Guillermo - Nandor's long-suffering Latino familiar - hangs in the balance as the vampires receive a promotion.
A.P. Bio, 10.00pm, Sky Comedy
Streaming on NOW
It’s season four of the acclaimed comedy revolving around nightmare teacher Jack Griffin, played by Glenn Howerton.
It revolves around Griffin, his long-suffering class of honour roll students, and the other misfit faculty members of Whitlock High School.
In the first episode, a tornado puts the school on lockdown and Helen believes it's coming specifically for her.
The kids pass the time by writing fan fiction, "shipping" various combinations of faculty members, while Mary, Stef and Michelle devise a plan to escape the school.
Then, Jack has the students form a fake cult to sabotage Principal Durbin's new school uniforms, and Mary, Stef and Michelle prepare to see one of their favourite artists who is in town to perform.
Celebrity Antiques Road Trip, 7.00pm, BBC Two
More famous faces embark on the cross-country treasure-hunting challenge.

First up are supermodel Jerry Hall and psychotherapist and TV presenter Philippa Perry taking to the road with antiques experts Tim Medhurst and Charles Hanson.
New to Stream
Camp Confidential: America's Secret Nazis, Netflix
In this animated documentary short, WWII vets reveal a secret US military camp near Washington where Jewish soldiers hosted and interrogated Nazi POWs.
Ridley Jones: Season 2, Netflix
The museum magic continues for brave kid Ridley and her courageous crew with new friends, more risky missions and Ridley's quest for her Compass Eye!