Nathan Fillion is opening up about his time in film and television.

The Canadian born actor talked about his long-standing career during Sunday’s Comic-Con @ Home, including his most popular roles in “Firefly”, “Castle”, and “The Rookie”.

RELATED: The Cast Of ‘Family Guy’ Talk About Their Favourite Moments From The Show During Comic-Con @ Home

“‘Firefly’ has been my favourite job I have ever had since ‘The Rookie,'” Fillion said.

“It’s just grown over time,” said special guest and Fillion’s “Firefly” co-star Alan Tudyk.

“You have people who experienced it the first time who are sharing it with their children,” added yet another special guest and ‘Firefly’ actress Gina Torres.

RELATED: Cast Of ‘The 100’ Make Their Final Comic-Con Appearance During Comic-Con @ Home

Other guests during Fillion’s talk include Jon Huertas (“Castle”), Joss Whedon, Mekia Cox (“The Rookie”), Molly Quinn (“Castle”), and Seamus Dever (“Castle”).

“Because you were such a leader and teacher, it was very easy to come in and ask questions and not feel pressure to know more than I did,” Quinn told Fillion.

RELATED: The Cast Of ‘NeXt’ Talks About Upcoming Tech Thriller At Comic-Con @ Home

ABC recently announced “The Rookie” will be coming back for a third season, however, it has not yet set a release date. According to ABC President Karey Burke in an interview with Deadlinethe show’s newest season will address issues of police brutality in the U.S..

You can watch the full Comic-Con discussion up top.