The adventures of SeaQuest DSV crew, an advanced high-tech submarine in mission to protect the oceans against all evil, in a 21st century where human race has colonized underwater.
| Actor | Role |
|---|---|
 Roy ScheiderCaptain Nathan Bridger | Captain Nathan Bridger |
 Jonathan BrandisLucas Wolenczak | Lucas Wolenczak |
 John D'AquinoLt. Benjamin Krieg | Lt. Benjamin Krieg |
 Don FranklinCommander Jonathan Ford | Commander Jonathan Ford |
 Stacy HaidukLt. Cmdr. Katherine Hitchcock | Lt. Cmdr. Katherine Hitchcock |
 Stephanie BeachamDr. Kristin Westphalen | Dr. Kristin Westphalen |
 Ted RaimiLt. j.g. Timothy O'Neill | Lt. j.g. Timothy O'Neill |
 Royce D. ApplegateChief Manilow Crocker | Chief Manilow Crocker |
 Marco SanchezSensor Chief Miguel Ortiz | Sensor Chief Miguel Ortiz |
 Richard HerdAdmiral Noyce | Admiral Noyce |
 Frank WelkerDarwin - (Voice) | Darwin - (Voice) |
 Shelley HackCapt. Marilyn Stark | Capt. Marilyn Stark |
 Michael ParksGeorge Le Chein | George Le Chein |
 Eric DaReMaxwell | Maxwell |
 William Morgan SheppardThe Professor | The Professor |
 Scott CoffeyBobby | Bobby |
 Rebecca StanleyAunt Jenny | Aunt Jenny |
 Justine ShapiroCmdr. Williams | Cmdr. Williams |