The meeting of two Time Lords is always an important event in Doctor Who, so when Doctors 2 and 6 encountered each other as part of the 21st season it was the perfect gift to give fans at the shows coming of age. Throw into the mix some Sontarans and location filming in Seville, then you have a hotch potch of ingredients which needed the late, great Robert Holmes to try and make sense of it all. Perhaps the finest performance of the story comes from John Stratton as Shockeye, an Androgum with a permanent taste for human flesh. Jacqueline Pearce, a refugee from Blake's 7, is on hand to co-ordinate events hampered as she is by the camp Sontarans with their ill fitting neck braces. Ridding the Sontaran's of their customery menace is one of the mistakes of this romp. The story as a whole doesn't quite hang together like you'd expect of a Holmes script although re-uniting Patrick Troughton and Frazer Hines is a masterstroke with both of them slipping easily back into their on screen personas as time had not passed at all. The sixth Doctor is not to be sidelined however in this tapestry, Colin Baker and Nicola Bryant give sterling performances as they endeavour to find out what lies behind the attack on the space station.

This is Patrick Troughton's swansong to the world of Doctor Who, and although not the finest story he has appeared in, it does give him a chance to shine not least when Dastari augments the second Doctor and he begins to show the traits of an Androgum. Farewell cosmic hobo, you have more than earned your legend.

COLIN BAKER ONLINE RATING 7/10

A tramp and a man in a skirt... The 60's were very black and white.

It's a big one Peri... (oooh eerrr missus !)

"We'll soon get the hang of this Trick Or Treat-ing..."

No co-star had thought of shooting Frazer Hines before !

He'd always wanted one of those: a decent costume.

The Two Doctors is available as a standalone BBC DVD release (Regions 1, 2 & 4) and as part of the Bred For War box set (Regions 2 & 4).

When the Doctor (Colin Baker) lands on a space station in the Third Zone, he suspects he's been there before and when he discovers his old assistant - Jamie - he's certain. Accompanied by Jamie and his present assistant Peri, the Doctor follows himself (Patrick Troughton) to 20th Century Seville. There he discovers his old enemeies, the Sontarans, about to dissect him in a genetic operation. But just why are they operating on the Doctor? And how will their findings aid their enslavement of the universe? Deadly questions to which the Doctors must find answers in order to escape their own excruciating death...

Starring: Patrick Troughton, Colin Baker, Nicola Bryant. Directed by: Peter Moffatt