I hope the link works as I've never submitted a deal re Itunes. Thought it was a good price though for the download. Its not the greatest but far from the worst from the classic series.
The Two Doctors is one of those occasional adventures in which the then-current Doctor joins forces with one of his former incarnations, here Colin Baker's sixth Doctor with Patrick Troughton's second Doctor.
This adventure starts encouragingly enough, with Troughton and Jamie (Frazer Hines) investigating time-travel experiments on a space station, which endanger the fabric of the universe. Baker's Doctor and Peri (Nichola Bryant) arrive in the aftermath of a massacre and suspect the Timelords; but events lead them to Spain and old enemies the Sontarans. Also involved is alien schemer Chessene (Jacqueline Pearce) in a role not dissimilar to her Servalan from Blake's 7, while John Stratton as Shockeye, a food-obsessed alien "Androgum" chef is vastly entertaining.