Marvel's Agents Of S.H.I.E.L.D. Gets First Trailer

The first promo trailer has been unleashed for Joss Whedon's new TV series based on Marvel's Agents Of S.H.I.E.L.D.

ABC has released a 30-second promo clip for the hotly anticipated small-screen project, which features Clark Gregg reprising his role as Agent Phil Coulson from The Avengers and the Iron Man movies.

He provides the voiceover for the action-packed clip, saying: "We work the cases that S.H.I.E.L.D. hasn't classified. The strange, the unknown. It's not just spy vs spy anymore. The whole world's in on the action."

Ming-Na Wen stars as Agent Melinda May, Brett Dalton plays Agent Grant Ward, Elizabeth Henstridge is science boffin Agent Gemma Simmons and Iain DeCaestecker plays techie Agent Leo Fitz.

The show is directed and co-written by Joss Whedon - and is based on the secret intelligence service which appears across a range of Marvel's comic book titles.

No transmission date has yet been announced.

A Marvel exec last week suggested Iron Man could continue without Robert Downey Jr.