Margaret John

Margaret John appeared in two Doctor Who stories: as Megan Jones in Fury from the Deep and Grandma Connolly in Tardisode 7 and The Idiot's Lantern.

John held the record of the longest gap — 38 years — between Doctor Who appearances. (Although there was a 39-year gap between Bernard Cribbins' on-screen appearances in the franchise, he had guest-starred in a Big Finish audio drama before his appearance in 2007.)

Her television career spanned over five decades, from Bronwen in a 1960 BBC production of to Old Nan in the first season of HBO's Game of Thrones, which aired after her death in 2011.