The Three Companions ( audio story ) The Three Companions was a twelve - part mini - series . It was included on the main " Doctor Who " range as a bonus between April 2009 and February 2010 . Each episode was ten minutes long , making a two hour play in total . The entire story was collected in a compilation on " " CD box set . Publisher ' s summary . Polly Wright has tracked down an old friend of the Doctor ' s . . . Alistair Gordon Lethbridge - Stewart , former Brigadier at UNIT . As they trade stories of their time travel ling in the TARDIS , it soon becomes clear that their pasts are intertwined , and linked to a current crisis on the planet Earth . And there ' s a third companion , watching them from a distance . A certain Thomas Brewster . . . Synopsis . Polly ' s Story ( 1 ) . The present day : Polly Wright , former companion of the Second Doctor , tracks down Sir Alistair Gordon Lethbridge - Stewart via the Internet . As they chat online , they realise that they have a shared experience - and one that began on a world far away . ( Included on " The Magic Mousetrap " ) In Memoriam ( 2 ) . The Doctor , Polly , Ben Jackson and Jamie McCrimmon are trapped on a doomed world scheduled for cremation . What are the coffin - loaders and why does Lethbridge - Stewart remember them too ? ( Included on " Enemy of the Daleks " ) The Gathernaut ( 3 ) . On a planet scheduled for cremation in thirty - five minutes , the Doctor , Polly , Ben and Jamie meet an unlikely ally . ( Included on " The Angel of Scutari " ) Cremation Point ( 4 ) . As the end of a world approaches , Polly , Ben and Jamie attempt to escape the Gathernaut . ( Included on " The Company of Friends " ) The Brigadier ' s Story ( 5 ) . Polly ' s tale is over , but now Lethbridge - Stewart shares his story of a rare excursion in the TARDIS , when the Third Doctor answered a distress call from a distant galaxy . What is the secret of Waterloo Station ? ( Included on " Patient Zero " ) Coffin - Loaders ( 6 ) . In a place that looks like a jumbled - up Earth , the Third Doctor and the Brigadier have met a woman who looks just like Polly Wright , but she isn ' t . Meanwhile , in the real world , the real Polly has a new acquaintance – a young man called Thomas Brewster . ( Included on " Paper Cuts " ) The Hunting Ground ( 7 ) . The Brigadier and the Third Doctor are fighting for survival on a model world that looks like Earth . Why are there facsimiles of Polly Wright here and who is the mysterious Garry Lendler ? No one is more anxious to find out than Thomas Brewster . . . ( Included on " Blue Forgotten Planet " ) The Battle of World ' s End Junction ( 8 ) . Cornered by the coffin loaders , the Doctor and the Brigadier make their last stand at World ' s End Junction . Meanwhile , the mysterious Thomas Brewster finally prepares to step out from the shadows . . . ( Included on " Castle of Fear " ) Many Meetings ( 9 ) . In a café , three strangers meet : Polly , the Brigadier and Thomas Brewster . They share one thing in common – they have all travelled in time and space with the Doctor . Now the Doctor isn ' t here , and the world is in terrible danger . . . ( Included on " The Eternal Summer " ) Brewster ' s Story ( 10 ) . As Polly and the Brigadier become acquainted with Thomas Brewster , chaos erupts . UNIT troops are on the streets of London and the Hunter is on the prowl . . . ( Included on " Plague of the Daleks " ) The Hunter ( 11 ) . With the coffin loader on the rampage in London , Polly , the Brigadier and Brewster meet an old acquaintance . Can he cure the planet ' s accelerated global warming ? ( Included on " A Thousand Tiny Wings " ) The Sacrifice ( 12 ) . As London floods , can Polly and Thomas Brewster save the Brigadier from the clutches of the Hunter ? ( Included on " Survival of the Fittest " ) Plot . " to be added "