voice-over narration for all the installments. Nelson also educated non-diving characters in various aspects of diving and the underwater world. The series made frequent references to Marineland of the Pacific, which provided facilities, resources, and technical advice to the production company. At the end of each episode, Bridges appeared as himself to deliver a brief comment. These comments sometimes included a plea to viewers to understand and protect the marine environment, along with gems of wisdom from Bridges' own experiences. A number of notable actors appeared on the series early in their career, including Leonard Nimoy, Bruce Dern, Robert Conrad, Ross Martin, Robert Clarke, Larry Hagman, Larry Pennell, Ken Curtis, William Boyett, Jack Nicholson, and Bridges' own sons Beau and Jeff. Production notes Underwater sequences were often created during post-production from individual scenes shot at many different locations, including studio tanks and various underwater sites in California, Florida, and the Bahamas. Much stock footage was shot and later mixed with episode-specific character footage. Filming locations included: Marineland of the Pacific (Park operated 1954–1987) the front side of Santa Catalina Island, California Paradise Cove west of Malibu Silver Springs, Florida Cypress Gardens, Florida Tarpon Springs, Florida Nassau, Bahamas Grand Bahama Island On-land location shots were filmed throughout Los Angeles, central Florida, Nassau, and on a sound stage. Famous divers such as Zale Parry and Albert Tillman were involved in production of the show, as was Jon Lindbergh, son of aviator Charles Lindbergh. Parry was joined in 1960 by 18 year-old Wende Wagner as a female underwater stunt double. Pioneering underwater cinematographer Lamar Boren shot nearly all of the underwater footage for the series. John Lamb shot the underwater sequences for both the movie and TV versions of Irwin Allen's Voyage to the Bottom of the Sea, and also filmed some episodes of Sea Hunt. Stunt diver Ricou Browning is credited with coordination of the underwater action sequences during the second season. The boat used in the series was named the Argonaut after the mythological Greek heroes who sailed with Jason on the quest of the Golden Fleece. Several cabin cruisers were utilized in filming, and one notable model was the Trojan Express, custom built by Trojan Yachts in 1960 with mahogany planking and teak decks and trim, measuring 33 feet long and 12 feet wide. Diving equipment was supplied by Voit and a Navy depth gauge supplied by Sportsways, Inc. Wetsuits