Roy Scheider

as Captain Nathan Bridger

Jonathan Brandis

as Lucas Wolenczak

John D'Aquino

as Lt. Benjamin Krieg

Don Franklin

as Commander Jonathan Ford

Stacy Haiduk

as Lt. Cmdr. Katherine Hitchcock

Stephanie Beacham

as Dr. Kristin Westphalen

Ted Raimi

as Lt. j.g. Timothy O'Neill

Royce D. Applegate

as Chief Manilow Crocker

Marco Sanchez

as Sensor Chief Miguel Ortiz

Richard Herd

as Admiral Noyce

Frank Welker

as Darwin - (Voice)

Shelley Hack

as Capt. Marilyn Stark

Michael Parks

as George Le Chein

Eric DaRe

as Maxwell

William Morgan Sheppard

as The Professor

Scott Coffey

as Bobby

Rebecca Stanley

as Aunt Jenny

Justine Shapiro

as Cmdr. Williams