The Lost Boy (The Sarah Jane Adventures) - Continuity

Continuity

• The Slitheen reappear in these episodes, this time wearing new slimline skin-suits.
• The Blathereen, cousins and rivals of the Slitheen, wore slimline skin-suits in The Monsters Inside.
• Clips from "Invasion of the Bane", Revenge of the Slitheen and Eye of the Gorgon were shown in these episodes.
• K-9 returns briefly in Part Two to distract and battle Mr. Smith. This episode marks his first appearance since "Invasion of the Bane".
• The Pharos Institute was named after the Pharos Project in Doctor Who serial Logopolis.
• Sarah Jane's membership in UNIT during her original run as a companion of the Third and Fourth Doctors is stated in the report the Chief Inspector reads. Attached to it is a photograph of Sarah Jane from the classic era.
• The UNIT dating controversy is addressed on the report about UNIT that the Chief Inspector reads, and to which Sarah Jane's photograph is attached. The report's second paragraph refers UNIT's "golden period that spanned the sixties, the seventies, and some would say, the eighties."
• When asked by Alan if the Slitheen would ever return to Earth from Raxicoricofallapatorius, Sarah Jane says she imagines so.
• Mr Smith's crystalline self was discovered by geologists at the site of Krakatoa which Sarah Jane describes as "the biggest volcanic eruption civilisation has ever seen." Either the First or Second Doctor was present at the eruption, as was the Ninth Doctor.
• Sarah Jane's monologue in the final scene, "I've seen amazing things out there in space, but strange things can happen wherever you are," reprises her voiceover from the start of the pilot episode, "Invasion of the Bane".