Roy Scheider

Captain Nathan Bridger

Jonathan Brandis

Lucas Wolenczak

John D'Aquino

Lt. Benjamin Krieg

Don Franklin

Commander Jonathan Ford

Stacy Haiduk

Lt. Cmdr. Katherine Hitchcock

Stephanie Beacham

Dr. Kristin Westphalen

Ted Raimi

Lt. j.g. Timothy O'Neill

Royce D. Applegate

Chief Manilow Crocker

Marco Sanchez

Sensor Chief Miguel Ortiz

Richard Herd

Admiral Noyce

Frank Welker

Darwin - (Voice)

Shelley Hack

Capt. Marilyn Stark

Michael Parks

George Le Chein

Eric DaRe

Maxwell

William Morgan Sheppard

The Professor

Scott Coffey

Bobby

Rebecca Stanley

Aunt Jenny

Justine Shapiro

Cmdr. Williams