
Marina, along with Captain Troy Tempest and Lt. 'Phones' Sheridan, is a crew member on the W.A.S.P.'s Stingray submarine.
For the Battle of Hastings' 1000th anniversary, the Stingray crew were sent to England in order to represent the W.A.S.P. Accompanying them on their journey was a TV crew, which unbeknown to everyone on board was led by the Hood, in disguise as one "Rudolph Cass". The Hood has been hired by X20 in order to sabotage the submarine, and use it to destroy the other dignitaries ships at their destination.
After Troy had noticed something wasn't right with their guests, he and his team decided to keep a perpetual watch on their guests and the ship to ensure everything remained in order. While it was Marina's turn to keep watch, she heard footsteps and followed them into the missile hold. One of the missiles, dislodged from its secure holding by the Hood, fell towards Marina, but Phones noticed and alerted Marina to the danger.
After "Cass" damages the radio unit and blames it on Troy, Marina and Phones are forced to play along with the Hood's game and 'arrest' Troy. In reality, Phones has discovered a bugging device and doesn't want to arouse suspicion that they know something isn't right. Thinking he's ahead, the Hood reveals his identity, but is overpowered by Phones and is handed over to British authorities.
But the police vessel the Hood is being held in is attacked by a submarine they recognise as X20's. They take the Stingray in pursuit of the vehicle after it enters international waters. Arriving at a misty cliff, Marina stays behind in Stingray while Troy and Phones go out to investigate.
Marina appeared in the Stingray crossover story A Trip to England. She also made an appearance in the Fireball XL5 60th Anniversary Comic Anthology crossover story, Interplanetary Rescue, when she and the rest of the Stingray crew helped International Rescue save Captain Scarlet and the crew of Fireball XL5.
Trivia[]

Marina as she appeared in the Stingray television series.
- Marina originated as a character in the previous AP Films production Stingray. She would be silent throughout the series due to a curse placed on her race — at least according to the comics. The existence of such a curse is however incompatible with events in the TV series, most notably when Troy Tempest enlists the help of a speech therapist to teach Marina to speak in the episode Countdown.
- Marina was voiced by Sylvia Anderson during a dream sequence.
- A regular comic about the events leading to Titan's rise of power, Marina's curse of silence, and first encountering the Stingray crew was published in the Lady Penelope, entitled Marina Girl of the Sea.
- The puppet that was used to 'play' Marina would go on to make several guest appearances in Thunderbirds.
Outfits[]
Marina usually wore the same sea-green outfit, but for special occasions, she had a silver-colored one. The most unique aspect of her attire is however that she always went barefoot. This was probably done to remind us that, in the final analysis, she is a mermaid (albeit one without a tail).