Kingdom among them. Generally, the canonicity of the various Doctor Who spin-off media is open to interpretation. Character creation The character was created largely because the production team decided that the character of Katarina, introduced in the previous serial The Myth Makers, would not work as a regular. Thus, Sara has some of the attributes and narrative function of a traditional Doctor Who companion. However, the official BBC website cites as "myth" the notion that Sara was created as a companion to replace Katarina. There were no plans to have Sara continue as a character beyond The Daleks' Master Plan. Marsh herself said in a 2003 interview for the Loose Cannon telesnap reconstruction that she would "definitely not" have continued in the role past Master Plan, even had it been offered to her. A Production Diary compiled by David J. Howe, Mark Stammers and Stephen James Walker from contemporary memos and correspondence notes that producer John Wiles and story editor Donald Tosh employed Sara Kingdom as a "short-term companion...[to] be killed off at the end of [The Daleks' Master Plan]". She was billed as "'Sara Kingdom" in the episodes "The Traitors" to "Coronas of the Sun", but her surname was dropped from the billing in her final six episodes and thus she was billed as "Sara" from "The Feast of Steven" to "Destruction of Time". Companion Steven Taylor is similarly billed simply as "Steven" throughout The Daleks' Master Plan. Jean Marsh had previously appeared in Doctor Who playing King Richard's sister, the Princess Joanna, in The Crusade. Marsh would return to the programme in the 1989 serial Battlefield, playing Morgaine, coincidentally with Nicholas Courtney as Brigadier Lethbridge-Stewart, thus appearing in both his first and last regular Doctor Who episodes. Courtney also played Bret Vyon in Master Plan. In 2007 she appeared opposite the Sixth Doctor and Mel in the Big Finish Productions audio drama The Wishing Beast. Proposed use after Doctor Who According to The Official Dr. Who & the Daleks Book, Sara Kingdom was originally devised by Terry Nation as a supporting character in a proposed American-produced spin-off of Doctor Who that would have focused on Kingdom and her colleagues fighting the Daleks. A 30-minute script titled The Destroyers was created for a potential pilot episode which was never produced. List of appearances Television Season 3 The Daleks' Master Plan Audio Home Truths The Drowned World The Guardian of