
When Bonnie Langford joined Doctor Who as new companion Mel Bush in 1986, she wasn't sure if she would be in the show for more than a couple of years — let alone appearing in it nearly 40 years later!
After originally departing the TARDIS in 1987, Bonnie reprised the role of Mel for the 1993 Children in Need special Dimensions In Time, as well as in various Doctor Who audio dramas, but her first canonical return on TV came in 2022's "The Power Of The Doctor", the swansong for Jodie Whittaker's 13th Doctor, when Mel made a cameo appearance in a scene where former companions of the Doctor met in a support group.