Freema Agyeman talks about her encounter with the Daleks in an interview on Digital Spy.
"I was so excited when I knew it was going to be a Dalek day," she says.
"They came rolling on, and it was incredible. It was like holding a sonic screwdriver for the first time... or walking into the Tardis, all those moments, it's like goosebumps, heart racing. You think 'I'm actually part of this and I can't believe it'. The Daleks were a big moment."
The interview is in two parts, with the second one going online on Sunday.