Two stars from Joss Whedon’s short-lived, cult television series Firefly were reunited on Saturday at MCM London Comic Con.

Actors Summer Glau and Sean Maher (who played siblings River Tam and Dr Simon Tam respectively) joined the stage for a lengthy Q&A session with their fans. The pair completely packed the room on the sold-out Saturday, which is pretty impressive for a television show that didn’t even make it through its first season.

Despite it’s short life, Firefly has a massive and dedicated fan base. Glau and Maher agreed that it was probably this aspect that helped fans become so fanatical. But it didn’t hurt that the story and its characters were each so special.

Maher recalled how when the cast first started working together, the chemistry was both instantaneous and organic. Their sibling affection for each other helped create some of the more dynamic parts of the show. Each after sighted the other as a larger reason as to why their performances did so well.

The actors said that the filming was a unique and special experience. Glau said that she was mostly kept in the dark about the future of the show, and said that creator Joss Whedon only gave her glimpses into her character’s past – information that she wouldn’t divulge to the fans.

The subject of Glau’s ballet training came up multiple times in her responses. But her character River uses a variety of martial arts in the Serenity film. Glau spoke about how her “gangly limbs” were used to her advantage to form a unique style that was one of the more impressive aspects of the movie.

Both Glau and Maher’s characters were at the forefront of Firefly’s follow-up film (and excited about having dialogue on so many pages). Glau especially had to work on her martial arts training, which she said she began several months before filming even began.

“It became my life,” said Glau, reflecting on her training – which included lessons with 12-year-old boys who all refused to be her partner.

Glau and Maher also discussed the string of cancelled shows they’ve both been on. Maher especially felt jaded after having a number of his shows axed by the same network on multiple occasions. But if the success of Firefly proves anything, its that there can still be love for a show that is gone too soon.

But mostly, both actors look back fondly on their time on both Firefly and the follow-up film Serenity. Both actors have worked with Whedon on multiple occasions. Whedon himself mostly lives in the realm of movies these days, but a full-fledged return to television would always be welcome.

Minor note, but bonus points for Glau’s super-adorable little girl. She could be heard chatting away during the entire hour. And is apparently a big fan of The Jetsons.