Karen Gillan says the thing she is going to miss most about 'Doctor Who' is being chased by monsters.
The 24-year-old actress and her co-star Arthur Darvill leave their roles as married companions Amy Pond and Rory Williams this December after three years on the BBC sci-fi series.
Karen admits no other TV show will ever be like the time travelling adventures she had alongside Arthur and Matt Smith - who plays the titular character - because there will be no aliens to flee.
She said: "There's so much I'm going to miss. I'm definitely going to miss these guys (Matt and Arthur), we've become quite good friends now. I'm going to miss running down corridors away from monsters - it's just the most fun. Now I'm going to do TV shows where I'm just talking with people."
Arthur is also sad to be leaving the TARDIS, but he knows the influence of the programme will never leave him or Karen completely.
He said: "I'm going to miss the people we've been working with for three years ... It's such a big bunch of really good people who like doing the job they do because they're making something quite exceptional. It's like a big family.
"But every job we do the chances are there will be someone who has been in, or written for, or directed an episode of 'Doctor Who', it will kind of never leave us. There's a huge network of people who have been involved in the show and it will follow us around for the rest of our lives."
Matt is also sad to see his friends leave.
However, the 29-year-old actor accepts the show needs change to stay exciting and he has been enjoying working with Jenna-Louise Coleman, who plays new companion Clara Oswin.
He said: "It was very difficult to see them go. I've spent three years with them - we've even developed our own language together. By the same token, it's very exciting having someone new."
'Doctor Who' returns to TV screens in the coming weeks with 'Asylum of the Daleks'.