Doctor Who spin-offs the charity's 2005 appeal. This starred David Tennant as the Tenth Doctor and Billie Piper as Rose Tyler, and filled in a gap between the episodes "The Parting of the Ways" and "The Christmas Invasion". A third Children in Need special, but one that was part of the series' continuity, was produced for the charity's 2007 appeal. "Time Crash" starred David Tennant as the Tenth Doctor and Peter Davison as the Fifth Doctor, and filled in a gap between the episodes "Last of the Time Lords" and "Voyage of the Damned". This takes part directly after Martha leaves the TARDIS,
Doctor Who spin-offs was produced by animation company Nelvana in the 1980s, but the series was not produced. CBBC originally expressed an interest in a "Young Doctor Who" series, chronicling the childhood of the Doctor. Russell T Davies vetoed this concept, saying "somehow, the idea of a fourteen-year-old Doctor, on Gallifrey inventing sonic screwdrivers, takes away from the mystery and intrigue of who he is and where he came from,". He instead suggested "The Sarah Jane Adventures" (see above). A further spin-off of "Doctor Who"—"Rose Tyler: Earth Defence", a 90-minute special that could possibly become an annual event—was cancelled by Davies at a