Kirk Acevedo by Maury Phillips/WireImage.co
The Black Donnellys Oz
) and Mark Valley
( Boston Legal
) have joined the cast of Fox's Fringe
, a $10 million sci-fi pilot from Lost boss J.J. Abrams
that concerns a female FBI agent who works with an institutionalized scientist to investigate unexplained phenomena. Both actors are playing FBI agents. A Warner Bros. rep tells TVGuide.com there is nothing to report yet regarding the casting of the two leads.