John Benjamin Hickey

'CSI' alum William Petersen is joining 'Manhattan'

'CSI' alum William Petersen is joining 'Manhattan'

Attention "CSI" fans still broken-hearted by Det. Gil Grissom's retirement: William Petersen is coming back to TV.

Aside from his occasional return appearances on "CSI" and other assorted roles, Petersen hasn't been a series regular on anything since 2009. But he'll be part of the main cast of WGN America's "Manhattan" in the drama's second season.

Petersen will play Col. Emmett Darrow, described as an "enigmatic new ranking military officer at Los Alamos" who is also "a deeply religious and patriotic man" who sees himself as anointed by God to bring America's nuclear power across the planet.

Sounds like exactly the wrong...