Doctor Who: River Song will return for Christmas Special alongside Peter Capaldi

'The most complicated relationship in the universe' will be explored once more

Alex Kingston will return for the Doctor Who 2015 Christmas special (BBC)

Time traveller River Song will meet her husband’s new incarnation, in the form of Peter Capaldi, for the first time this Christmas.

Alex Kingston will return to play River Song in the Doctor Who Christmas special, the BBC has confirmed.

The character made her first Doctor Who appearance in 2008 and has starred in 15 episodes since.

Kingston said she didn’t know whether River would ever return to Doctor Who, but has enjoyed filming the episode alongside Capaldi.

Jenna Coleman, Peter Capaldi and Nick Frost in the 2014 Doctor Who Christmas Special, Last Christmas (BBC)

“I met Peter for the first time at Monday’s read through, we had a laugh, and I am now excited and ready to start filming with him and the Doctor Who team. Christmas in September?, why not!”, she said.

Steven Moffat teased what fans may expect to see from the “most complicated relationship in the universe”.

“The last time the Doctor saw her she was a ghost. The first time he met her, she died. So how can he be seeing her again? As ever, with the most complicated relationship in the universe, it’s a matter of time …”, he said.

Other guest stars joining Kingston and Capaldi for the Christmas special will be announced in the coming months.

Doctor Who will return to BBC One on Saturday 19 September, followed by a Christmas special on Friday 25 December.