Play School (series)

Play School is a children's television series created by Joy Whitby which originally aired beginning on 21 April 1964 on BBC2, and later aired on BBC1. It featured various presenters, including Derek Griffiths

Crossover
The series briefly crossed over with the Doctor Who universe in the 1998 BBC promotional video, which featured a young boy travelling through the settings of several series, including Play School and Doctor Who.

Partway through the promo, after the boy walks away from the sets of Blue Peter and Newsround, he encounters Derek Griffiths, who suggests the viewer to look through the square window, through which the boy can be seen entering the closet from The Chronicles of Narnia.

Cast connections
To be added

Miscellaneous connections
Play School was included on the CD "Themes from Children's BBC", alongside Doctor Who.