Alcatraz - Casting News - Greyston Holt joins cast

Thanks to Darthlocke for the heads up.

Greyston Holt will reportedly portray a younger version of Sam Neill’s character Emerson Hauser—a government agency director.

Holt starred in the 2008 sports film Slap Shot 3: The Junior League and played Ray Prager Jr. on the Canadian series Durham County.
Scottish actor Paul McGillion, best known as Dr. Carson Beckett on Stargate: Atlantis, also has a speaking role in the Alcatraz pilot.
Extras were cast as tourists, cops, prisoners, and park rangers.

Source: examiner