Due to a contract dispute with the
regular cast, Verity Lambert decides that Jenny will not be retained as
a new companion; Pamela Franklin is subsequently replaced in The Dalek Invasion Of Earth by Ann
Davies
1975
Chris Boucher is commissioned to
provide a storyline for “Prime
Directive”
1983
The BBC announces that Colin Baker will
play the Sixth Doctor
1986
The BBC announces that Doctor Who
will return for Season Twenty-Four
