The last season debut of HBO’s Emmy award-winning series Veep headlines a busy week of show premieres.

The sixth and final season of the multi-Emmy winning series Veep, which stars Julia Louise Dreyfus as politician Selina Meyer, debuts March 31 with seven episodes, according to HBO.

New series premiering this week include Fx’s vampire-themed mockumentary What We Do in the Shadows (March 27) and Prime Video’s Hanna (March 29).

Below are video trailers and premiere dates for several other shows debuting this week on cable networks and streaming services:

March 25 -- Knightfall (drama series) -- History

March 25 -- One Nation Under Stress (documentary) -- HBO

March 25 -- Jesus: His Life (documentary series) -- History

March 27 -- Happy (comedy series) -- Syfy

March 28 -- Tacoma FD (comedy) -- truTV

March 29 -- Osmosis (sci-fi/drama) -- Netflix

March 31 -- Barry (comedy) -- HBO

A genuinely strange program, adapted from a famed graphic novel, Happy! stars Christopher Meloni as Nick Sax, aptly described by Syfy as an intoxicated ex-cop turned hit man, and he hams things up to perfection.

A twisted Christmas holiday tale takes place in which a little girl, Hailey (Bryce Lorenzo), whose mom is connected to the police somehow, is kidnapped by a disgusting bad Santa. The little girl has an imaginary friend, Happy.

Related: Watch Syfy's "Happy" Trailer

Happy is visible to only Hailey and Sax as a little blue flying unicorn voiced by Patton Oswalt. Happy’s mission is to get Sax to come and save Hailey.

The humor here is dark and, without Meloni’s brilliance in the duets with it, Happy the character might grate a little bit too much. Lili Mirojnick as a heavily involved cop and Medina Senghore as Hailey’s mom keep the Hailey subplot ticking. Some brilliant visuals, especially in the opening sequence.

Syfy is dipping its toe into the world of augmented reality to promote Happy!, a series that’s set to premiere Wednesday, Dec. 6.

Syfy’s AR app for Happy!, offered on iOS and Android devices, features the show’s title character, an imaginary blue-winged horse that is named – you guessed it – Happy.

RELATED: Apple Gears Up for VR, AR

Consumers can use the lens of the app to show Happy interacting with real-world surroundings, as he’s able to sit, fly, and answer questions. His bag of AR tricks includes digitally defecating on your carpet, according to Variety. 

Syfy said Happy! follows Nick Sax (played by Christopher Meloni), an “intoxicated, corrupt ex-cop turned hit man” whose life is forever changed by his new imaginary friend, Happy (voiced by Patton Oswalt).