Show about monster-hunters among DVD releases

These current TV series have landed on DVD for the first time, led by a Canadian show about monster-hunters and comedian Demetri Martin's Comedy Central program.

"Sanctuary: The Complete First Season" (E1, 2009, four discs, $44.98). Fantasy fans are the target for this inventive Syfy cable-TV series about a team that seeks out creatures who hide from humans — both to eliminate predators and to rescue and study more benign subjects (a mermaid, for example).

The show is unabashedly derivative, owing much to "Supernatural" and its antecedent "Kolchak," with a forensic psychiatrist who is sort of "Monk" crossed with "Psych." And one episode owes more than a little to "Gremlins" crossed with the classic "Star Trek" episode "The Trouble With Tribbles." But it's also lively and amusing, with a game cast (led by Amanda Tapping, Robin Dunne and Emilie Ullerup) that seems to be having fun.

This is the first TV series to be filmed almost entirely on green-screen sets, with nearly everything filled in by computer graphics. Think of it as a show filmed entirely on the "Star Trek: The Next Generation" holodeck.

Extras: widescreen, 13 episodes, audio commentaries, featurettes, bloopers, Webisodes, photo gallery, trailers

"Important Things With Demetri Martin: Season One" (Comedy Central/Paramount, 2009, $19.99). In a TV landscape filled with skit comedy and standup, Demetri Martin is unique. He's offbeat, quirky, low-key and can be quite funny. He also looks like he's about 12. The blackout skits (some animated) in this cable show are hit and miss, but his standup bits with a sketch pad are better, as if he's some kind of absurd lecturing college professor. The occasional foul language will be off-putting to some.

Extras: full frame, seven episodes, deleted skits, audio commentaries, featurettes; "tiny poster"

"The IT Crowd: The Complete Season Three" (MPI, 2008, $24.98). The zany and hilarious tech team for a London corporation is back and still riotous in this lunatic British sitcom. Richard Ayoade is to this show what Jim Parsons is to "The Big Bang Theory," a socially inept geek who is screamingly funny.

Extras: widescreen, six episodes, deleted scenes, audio commentary, featurettes