Doctor Who Series 10: 13 Easter Eggs & References You Might've Missed In 'The Pilot'

If you thought that Bill's foster mother - credited as Moira - in this episode looked familiar, then that's because she has popped up on Doctor Who before.

Back in 2007, actress Jennifer Hennessy played Valerie in Gridlock - the one with the Face of Boe and all the cars stuck on the futuristic motorway. You might remember that she was the human wife of cat person Thomas Brannigan, as played by Father Ted's Ardal O'Hanlan.