Main Characters Commander Jonathan Ford 12 main appearances Lucas Wolenczak 12 main appearances Captain Oliver Hudson 11 main appearances Lieutenant Tim O'Neill 6 main appearances Lieutenant Lonnie Henderson 5 main appearances Captain Nathan Bridger 5 main appearances Seaman Tony Piccolo 4 main appearances Seaman Dagwood 4 main appearances Lieutenant James Brody 3 main appearances Lieutenant Benjamin Krieg 2 main appearances Ensign Darwin (voice) 3 main appearances Chief Manilow Crocker 3 main appearances LT CMDR Katherine "Katie" Hitchcock 3 main appearances Dr. Kristin Westphalen 2 main appearances Sensor Chief Miguel Ortiz 2 main appearances Lieutenant J.J. Fredricks 1 main appearances Dr. Wendy Smith 1 main appearances
Recurring Guest Characters Lieutenant Benjamin Krieg 1 guest appearances Secretary General Arthur McGath 2 guest appearances Milos Tezlof 1 guest appearances Lenny Sutter 1 guest appearances Frank Cobb 1 guest appearances Maximilian "Max" Scully 1 guest appearances Christine VanCamp 1 guest appearances Dimitri Rossovich 1 guest appearances Dr. Rafik Hassan 1 guest appearances Louis Jacobi 1 guest appearances Admiral Noyce 1 guest appearances Savannah Rossovich 1 guest appearances Libyan Representative 1 guest appearances