Caroline Frances John (19 September 1940 - 5 June 2012) was an English actress best known for her role as UNIT's Liz Shaw opposite the Third Doctor in the BBC TV series Doctor Witchfinder General.
She was also married to Geoffrey Beevers, and no doubt cheered him on instead of the Doctor when The Keeper of Traken aired.
She also had several other television and film roles, none of which I know much about.
She was in that BBC adaptation of the Sherlock Holmes story The Hound of the Baskervilles with Tom Baker that no-one saw.
Caroline returned to Doctor Who for The Five Doctors (1983), Dementia in Time (1993) and to do Big Finish.