An all star cast, headed by William H.Macy, are aboard "U-Boat", a thriller going into production this week in Los Angeles. The Splendid Pictures production is the story of a group of American POWs who are brought aboard a U-boat and find their loyalties tested when they’re forced to join their German captors and fight for their lives.Tony Giglio directs the film from a script he co-wrote with John E. Deaver. The cast also includes Jeremy Sisto, Til Schweiger, Thomas Kretschmann, Lauren Holly and Scott Caan.