Having used short webisodes to test the waters of original content, is diving in with its first series of broadcast-length programming. Sony’s multiplatform network announced The Unknown, an anthology show by proven Hollywood talent for viewing without a cable subscription.

The Unknown is six 30-minute episodes, each of which tells a stand-alone thriller of unexplained phenomena, with performances by the likes of Frances Fisher (pictured; The Lincoln Lawyer), William Atherton (Life), Taryn Manning (Hawaii Five-O) and Jay R. Ferguson (Mad Men). It will become available later this year.

The series is executive produced by Chris Collins (Sons of Anarchy) and Steve Tzirlin, whose career includes co-head of Fox Filmed Entertainment’s of Fox Writers Studio and development/production executive at LucasFilm.

Martha Coolidge (CSI: Crime Scene Investigation) directs four of the episodes, with Kevin Connolly (Entourage) and visual effects guru Sam Nicholson (The Walking Dead) each directing an episode.

Crackle said The Unknown is part of its continued expansion, as are its successful Xbox Live launch and its iPad/iPhone apps.

Related links:

Crackle – press release

Photo shows Frances Fisher as The Mother in the Torchwood episode, “Miracle Day”