On the eve of Comic-Con International, ABC has debuted two new teasers for Marvel's Agents of S.H.I.E.L.D. and announced that composer Bear McCreary (Battlestar Galactica, The Walking Dead) will provide the score for the television series.

Courtesy of The Huffington Post comes the second in the series of "Level 7 Access" videos introducing the show's cast. While the first featured Brett Dalton’s Agent Grant Ward, the second turns the spotlight on Agents Leo Fitz and Jemma Simmons, the weapons-technology and science experts played by Iain De Caestecker and Eizabeth Henstridge.

"They are geeks, in a sense," De Caestecker admits. "They're very good at what they do."

In addition, the network has released a 15-second TV spot titled "The Saga Continues" (below) that plays up the drama's connection to The Avengers.

The show's Comic-Con panel, with announced guests Joss Whedon and Marvel’s Head of Television Jeph Loeb, will be held Friday. Airing this fall Tuesdays at 8 p.m. ET/PT on ABC, Marvel’s Agents of S.H.I.E.L.D. also stars Clark Gregg as Agent Phil Coulson, Ming-Na as Agent Melinda May and Chloe Bennett as Skye.

Tags: abc, marvel, bear mccreary, Marvel's Agents of S.H.I.E.L.D., Paul W.S. Anderson, Agents of S.H.I.E.L.D.

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