Marina reprised her role of Demona (From Gargoyles) for an unproduced episode of the planned series Team Atlantis (Which was to follow up on the movie Atlantis: The Lost Empire) titled "The Last".
When Marina was 19, her parents tried to arrange a marriage for her through a matchmaker. It was an old-fashioned Greek tradition to keep their daughters out of trouble. Marina refused to go along with the idea.
She appeared in several British television series and films such as Hazal, Minder and One Last Chance.
Only five other actors besides Marina had played the same character on three different Star Trek series. They are:
Jonathan Frakes who played William T. Riker
Armin Shimerman who played Quark
John de Lancie who played Q
Michael Ansara who played Kang
Richard Poe who played Gul Evek
Through the Fire is a sitcom pilot episode written by Michael Dorn and features Marina. At present, it has not been picked up by any network.
She is one of only six actors to appear in the finales of two different Star Trek series; Star Trek: The Next Generation (1987) and Star Trek: Enterprise (2001). The other actors are Jonathan Frakes, Brent Spinner, Michael Dorn, Colm Meaney and Jeffrey Combs.
She occasionally wore hair-pieces for her role as Deanna Troi in Star Trek: The Next Generation. Marina's real hair was slightly shorter, and although curly, was not as bouffant as her character's. However, Marina's real hair was used in the first two seasons, as well as in the first six episodes of season six during which she sported a pony-tailed style.
She has several action figures modeled after her likeness and her character, Troi, from Star Trek: The Next Generation
After Gene Roddenberry passed away in 1991, she recounted how it reminded her of the loss of her father ten years earlier. She mourned with Roddenberry's widow Majel Barrett-Roddenberry and admitted she felt even closer to her for it, as both her on-screen and real life daughter.
She has appeared in episodes of four different series with Jonathan Frakes: Star Trek: The Next Generation (1987), Gargoyles (1994), Gargoyles: The Goliath Chronicles (1996) and Star Trek: Enterprise (2001).
During Star Trek: The Next Generation and the movies, she had black colored contact lenses, because her character had black eyes.
She speaks Greek fluently.
Marina Sirtis: (discussing her character on "Earth: Final Conflict") Her name is Sister Margaret. She's the leader of a cult; they're like nuns, but they're not. And they are devoted to the Taelons, absolutely besotted with them. She discovers this kind of energy merging ceremony, or she develops it, and so she has this master plan to mingle the two species, but she also has a secret personal agenda that we don't know about until the end of the show. She's very weird and strange and edgy.
Marina Sirtis: When I told her that I got this great job in America, she didn't believe me. She thought I was lying just so I could stay in America and not go home. But finally, the trading cards and stuff started coming out and when she opened her wallet one day, there was a picture of me. A trading card. And so I knew finally that she was proud of me.
Marina Sirtis: When I told my parents that I wanted to be an actor, that was code for them to 'I want to walk the streets at night, you know, for money'.
Marina Sirtis: (on working on "Star Trek: The Next Generation")
I did a lot of theatre in England before I came to Los Angeles. You get this camaraderie, especially when you're doing a musical, this great feeling of togetherness, family and fun. Everyone is trying to corpse everybody else - that happens in the English theatre. I never thought I would ever have that camaraderie reproduced on a TV show or on a movie, but that was exactly what it was like on our show.
Marina Sirtis: (Speaking about the "Star Trek: The Next Generation" uniforms)
We hate our uniforms. We've said it a gazillion times. It's like a chant that we have to say every day. They're hot, they're uncomfortable, and we can't wait to get out of them.
Marina Sirtis: Besides Next Generation, I would have to say that most of my other favorite things that I've done have been theater projects. Playing Ophelia in Hamlet is one of my favorites. Esmeralda in The Hunchback of Notre Dame and Magenta in Rocky Horror are my other favorite stage roles.
Marina Sirtis: I wasn't a Star Trek fan, yet I knew who all the characters were. That goes to show what an impact the show had, not just in entertainment, but in life. I knew who Chekhov was and I knew who Kirk and Spock were, although I probably had never seen the show.
Marina Sirtis: I was originally cast to be the brains of the Enterprise. Somehow I became "The Chick". There's a little ugly girl inside of me going 'Yay! I'm a sex symbol!'