Joss Whedon‘s Marvel’s Agents of S.H.I.E.L.D. is one of the mostly eagerly anticipated new series of the upcoming season, even with all the secrecy surrounding it. ABC has now given us just a hint more information about the season premiere, including a great guest star.

Joss Whedon has a tendency to work with actors he has worked with in the past, and this series is no exception. We told you about guest stars J. August Richards (Angel) and Cobie Smulders (The Avengers), but now we know that a member of the Firefly cast will be guest starring as well; can’t wait to see Ron Glass back on our screens.

Here’s a new behind-the-scenes featurette, plus that press release with more info:

Featurette: Marvel’s Agents of S.H.I.E.L.D. – Behind the Scenes With Cast and Crew

AGENT PHIL COULSON IS BACK IN ACTION! THIS FALL HE ASSEMBLES A DEDICATED,
HIGHLY SELECT GROUP OF AGENTS FOR THE WORLDWIDE LAW-ENFORCEMENT AGENCY KNOWN AS S.H.I.E.L.D., WITH THEIR FIRST ASSIGNMENT TO TRACK DOWN AN ORDINARY MAN WITH EXTRAORDINARY POWERS – POWERS WHICH COULD HAVE DEVASTATING CONSEQUENCES — ON THE PREMIERE OF ABC’S “MARVEL’S AGENTS OF S.H.I.E.L.D.”

Joss Whedon, the creative genius behind the feature film “Marvel’s The Avengers,” one of the highest grossing films of all time, and of the iconic television series “Buffy The Vampire Slayer,” has co-created “Marvel’s Agents of S.H.I.E.L.D.,” a dynamic, action-packed one-hour drama that brings back Agent Phil Coulson (Clark Gregg) to lead a team of highly skilled agents to investigate extra-normal and super human people and events worldwide. The series premieres TUESDAY, SEPTEMBER 24 (8:00-9:01 p.m., ET), on the ABC Television Network.

These agents of S.H.I.E.L.D. have a mission: To investigate the new, the strange and the unknown around the globe, protecting the ordinary from the extraordinary.

In the premiere episode, “Pilot,” it’s just after the battle of New York, and now that the existence of super heroes and aliens has become public knowledge, the world is trying to come to grips with this new reality. Agent Phil Coulson is back in action and has his eye on a mysterious group called The Rising Tide. In order to track this unseen, unknown enemy, he has assembled a small, highly select group of Agents from the worldwide law-enforcement organization known as S.H.I.E.L.D. (Strategic Homeland Intervention Enforcement and Logistics Division). The group’s first assignment together as a team finds them trying to track down an ordinary man who has gained extraordinary powers. Powers that could have devastating consequences.

“Marvel’s Agents of S.H.I.E.L.D.” stars Clark Gregg as Agent Phil Coulson, Ming-Na Wen as Agent Melinda May, Brett Dalton as Agent Grant Ward, Chloe Bennet as Skye, Iain De Caestecker as Agent Leo Fitz and Elizabeth Henstridge as Agent Jemma Simmons.

Guest starring are J. August Richards as Mike, Shannon Lucio as Debbie, Ron Glass as Dr. Streiten and Bob Stephenson as Gary, with special guest star Cobie Smulders as Agent Maria Hill.

“Pilot” was written by Joss Whedon & Jed Whedon & Maurissa Tancharoen and directed by Joss Whedon.

“Marvel’s Agents of S.H.I.E.L.D.,” Marvel‘s first television series, was co-created by Joss Whedon, Jed Whedon & Maurissa Tancharoen (“Dollhouse,” “Dr. Horrible’s Sing-Along Blog”), who also serve as executive producers along with Jeph Loeb (“Smallville,” “Lost,” “Heroes”) and Jeffrey Bell (“Angel,” “Alias”). “Marvel’s Agents of S.H.I.E.L.D.” is produced by ABC Studios and Marvel Television.

“Marvel’s Agents of S.H.I.E.L.D.” is broadcast in 720 Progressive (720P), ABC’s selected HDTV format with a 5.1 channel surround sound. This program carries a TV-PG,V parental guideline.

For more information on “Marvel’s Agents of S.H.I.E.L.D.,” visit ABC.com

Marvel’s Agents of S.H.I.E.L.D., starring Clark Gregg, Brett Dalton, Ming-na Wen, Iain De Caestecker, Elizabeth Henstridge, and Chloe Bennet, premieres Tuesday, September 24 at 8/7c on ABC.