Barbara Kidd, who worked as a costume designer on Doctor Who episodes starring John Pertwee, Tom Baker, and Peter Davison, is set to return to the series later this year for the Christmas special then for the 2011 season, Gallifrey News Base reports.
"Barbara Kidd worked on the series at the start of her career, creating costumes as early as the 1973 Jon Pertwee story 'Frontier in Space'. She was a regular on the series throughout the mid seventies working on 'The Green Death', 'Invasion of the Dinosaurs', and 'The Monster of Peladon' before moving on to a new Doctor in the guise of Tom Baker for 'The Ark in Space', 'The Sontaran Experiment', 'Genesis of the Daleks', and 'Pyramids of Mars'. Her final contribution was for the Peter Davison story 'Kinda'."
Current showrunner Steven Moffat has planted several nods to the classic Doctors onscreen such as a TARDIS exterior resembling that of the First Doctor, Gallifreyan text in the episode "The Time of Angels" similar to the text at the end of "The Five Doctors" (and even a direct quotation regarding it echoing the words of the Second Doctor from the episode), and frequent cameos in the form of old footage of the classic Doctors appearing throughout the latest season.