David Strathairn leads the cast of Syfy's original drama centered on ordinary people who have extraordinary physical abiltiies.

UPDATED: The one-hour drama will not be returning to the network after a two-season run.

Syfy is not moving forward with Alphas after two seasons.

The cable network has canceled the one-hour drama created by Zak Penn and Michael Karnow, which centered on an unlikely team of ordinary people with superhuman physical and mental abilities that took on mysterious cases the CIA, FBI and Pentagon were unable to solve.

"We’ve been proud to present this entertaining, high-quality series for two seasons and to work with an incredible ensemble of talented actors, producers and creatives as well as our partners at BermanBraun Television," Syfy said in a statement to The Hollywood Reporter. "We’d like to thank the show’s dedicated regular viewers for their tremendous support."

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"Sad to say that ALPHAS will not be returning. What an honor to get to play Rachel for 2years & to work w/ & for the MOST AMAZING PEOPLE EVER," wrote cast member Azita Ghanizada on Twitter on Wednesday.

This comes months after Alphas wrapped its sophomore season in October with just a little more than 1 million viewers tuning in to the finale. Alphas, starring David Strathairn, began with more than double that viewership in July 2011 with 2.5 million viewers for its series launch.

For its part, Syfy is banking on projects from M. Night Shyamalan (Proof), Ronald D. Moore (Helix) and Bryan Fuller (High Noon) in the works for series consideration to add to its slate, which includes scripted fare Being Human, Continuum and Lost Girl. Syfy will roll out Defiance in April.

News of Alphas' cancellation comes one day after Lifetime closed the books on Drop Dead Diva after four seasons.

E-mail: Philiana.Ng@thr.com

Twitter: @insidethetube

