Game Of Thrones': Liam Cunningham Says Season 5 Will 'Be A Monster!' 

\'Game Of Thrones\': Liam Cunningham Says Season 5 Will \'Be A Monster!\'

Every year "Game of Thrones" gets bigger and Season 5 is no exception, according to the man who plays The Onion Knight, actor Liam Cunningham.

"It's gonna be a monster and it is world's colliding," Liam, who plays King Stannis Baratheon's right hand man, Davos Seaworth/The Onion Knight, told

earlier this week at the show's San Francisco premiere. "Some people are on extraordinary journeys."

Liam said he was definitely surprised by the material that came across on the script pages while they were filming.

WATCH: 'Game Of Thrones' Stars Preview Season 5

"Pretty amazed," he said of the developments he read about in the scripts.

"It could be termed, 'slightly dark,' some of this stuff. Some of the stuff is very dark this year," he continued. "The worlds colliding thing is very interesting. I mean, ours already did at the end of [Season] 4 with getting up to Castle Black and bumping into Jon Snow and all that… but, at the same time, on a positive note, Team Stannis is in probably the best position we've been in since we showed up on the show. We've got an army, we've had a bit of success and I think it's time we made a play for King's Landing."

WATCH: Liam Cunningham: What’s Next For Davos In ‘Game Of Thrones’?

Taking up residency at Castle Black meant that this season Liam, Stephen Dillane (Stannis) and Carice van Houten (Melisandre) had other longtime "GoT" actors to interact with behind the scenes, including Kit Harington (Jon Snow) and John Bradley (Samwell Tarly).

"We had such fun," Liam said of spending time with a greater number of his "Game of Thrones" castmates. "When we were shooting a lot of the Night's Watch stuff, or the Castle Black stuff, it was the first time we had a gang together 'cause we had the Night's Watch there. It was usually just the three of us. ... We're quite a small unit and it was just -- it was fantastic to just have a gang. It was like doing a theater show or something."

Fun fact: During downtime between scenes, the actors would play a version of "Name That Tune."

"A lot of us got out our iPads and were playing our music, and it was like 'beat the intro,' I think you call it. You know when you try and guess the song really quickly? So when you've got 10 people in the room, it was fantastic fun. [All these cast members] dressed up and they're going, 'It's Taylor Swift!'"

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"Game of Thrones" Season 5 premieres April 12 at 9 PM ET/PT on HBO.

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