The list of Governors of the Cole Hill Academy includes Chesterton, I and Wright, B. (Ian Chesterton and Barbara Wright, companions of The Doctor in Doctor Who (1963)'s first few seasons).
Two of the First Doctor's companions, Ian Chesterton and Barbara Wright, are listed in the school's Board of Directors, having originally been teachers when they met The Doctor and his granddaughter Susan in An Unearthly Child (1963). When Sarah Jane Smith did a search for previous companions of The Doctor, she discovered that neither Chesterton nor Wright had aged since they returned to the school after their travels aboard the TARDIS.
This episode takes place from October 12 to October 14, 2016.
Laura June Hudson (Mrs Linderhof) previously worked as the costume designer of eight Doctor Who (1963) serials from 1977 to 1981, all of which starred Tom Baker as the Fourth Doctor.