It has been a sad week for Doctor Who fans both old and new as the BBC confirmed that Caroline John – known to millions as Dr Elizabeth ‘Liz’ Shaw – has passed away.

Former cast members have taken to twitter to share their thoughts and memories of the actress who was more than a foil for John Pertwee’s Third Doctor.

The Sixth Doctor Colin Baker offered his condolences to her husband Geoffrey Beevers (The Keeper of Traken) and their family at this difficult time:

[blackbirdpie url="https://twitter.com/SawbonesHex/statuses/215784608476827648"]

And it was a sentiment shared by Anneke Wills – who appeared as Polly opposite both the First and Second Doctor:

[blackbirdpie url="https://twitter.com/AnnekeWills/statuses/215782750135910400"]

A clearly emotional Nicola Byrant – who played Perpugilliam “Peri” Brown – offered a brief comment on her passing:

[blackbirdpie url="https://twitter.com/thenicolabryant/statuses/215780681006055424"]

Steven Moffat shared his memories of John’s legacy during her time on the show via the official Doctor Who page:

“Caroline was a brilliant actress and in her role as Liz Shaw, a tremendous co-star for Jon Pertwee in his first year as the Doctor. She was not just a sidekick but a scientist in her own right and a match for the universe’s number one know-all. The Doctor’s companions should never be his assistants – they’re the people who keep him on his toes, and that’s what Caroline did. From everyone at the show, our thoughts go out to Caroline’s family.”

Caroline John passed away 5th June and is survived by her husband Geoffrey Beevers and three children.