A Town Called Eternity ( short story ) A Town Called Eternity was the second short story in the Short Trips anthology " Short Trips and Side Steps " . It was written by Lance Parkin and Mark Clapham . It featured the Fifth Doctor and Peri . Summary . Part one . The Sheriff of Eternity and Jack are waiting for rustlers . They have men hidden away for an ambush . Suddenly , the hidden men are attacked by something with " teeth like knives , skin like a tree trunk and glinting , alligator eye s " . The Sheriff and Jack are soon killed as well . The Doctor takes Peri to the Wild West in the 1880s to see Peri ' s past . They enter the saloon , run by Josh Larson , and introduce themselves . Josh thinks that the Doctor is Dr Sebastian Rowley , whom they are expecting to arrive to investigate the recent strange deaths . The Doctor goes along with the assumption . The deputy Sheriff , Paul , comes in with a plaster footprint . The Doctor recognises it as a dinosaur called a deinonychus . Peri , meanwhile , has gone for a walk with Josh , who , despite looking like a man in his twenties , claims to be one hundred and ten years old . He tells Peri of an elixir he bought when he was eighty . When he took it , he started becoming younger , and now only ages about a year for every ten . When Peri tells him she has a relative named Iziah Brown , he takes her to see the Brown family . Paul tells the new Sheriff about the arrival of " Dr Rowley " . The Sheriff asks for a description and recognises both the Doctor and Peri . The Doctor is in a shop looking at fossil s , and meets Sarah Brown , wife of Iziah Brown . She knows of Dr Rowley and is thrilled to finally meet him . She tells him of dinosaur bone s found on her land and offers to take the Doctor there . However , the Sheriff enters , and the Doctor discovers he is the Master . The Doctor is locked up . When Paul tells the Master about Peri , the Master decides killing her will make the Doctor suffer , and he and Paul leave . Sarah shows up with explosives and frees the Doctor . However , they are confronted by the Master and hypnotise d townspeople . The Master kills Sarah when he learns her last name , and gloats that he has just wiped Peri from history . He then tells the people that the Doctor is an imposter and has just killed Sarah Brown . The townspeople begin to attack the Doctor . Peri has met Iziah Brown and is surprised to learn that he has six wives . She wonders which of them might be her ancestor . As the Master gloats over the Doctor , the Doctor pulls at the mask that is covering the wounds the Master sustained on Sarn . The Master tells the Doctor he has found the Fountain of Youth , orders the townspeople to kill the Doctor , and leaves . Iziah tells Josh and Peri his family ' s secret : they have found the Fountain of Youth . Meanwhile , the townspeople have strung up the Doctor , and after fifteen minutes cut him down . Iziah and his five wives take Josh and Peri to the cave where the fountain is located . The fountain is in an area littered with dinosaur fossils . As they approach it , the Master appears with half a dozen armed , hypnotised men . He herds Iziah ' s group away from the fountain and fills a bucket with the water . Before he can use it , Peri slams into him , spilling the water . All around them , the dinosaur fossils that the water touched turn into living dinosaurs . . . Part two . As more velociraptor s regain life , the Master orders his gunmen to shoot them . During the ensuing carnage , Peri begins to herd Josh and the Browns to a nearby exit . As they make their way out , the Master notices and grabs Dana . Peri and Josh go back to rescue her , but the Master strangles her , hoping to erase Peri . Peri , enraged , throws Josh ' s lantern at the Master , and he begins to burn . Peri and Josh join the Browns and make their way back to the Brown house . The Master is attacked by a velociraptor but manages to shrink it with his Tissue Compression Eliminator . The shrunken raptor falls into the fountain and regains its life . The Master , seeing this , drenches himself in the fountain water and is healed . He proceeds to hypnotise the dinosaurs . The Doctor has been cut down and is being examined by the undertaker , Curtis , and his assistant Pete . They argue about whether or not to bury the Doctor . Curtis sends Pete to get a sack for the body , and is surprised when the Doctor sits up and speaks . Curtis runs off , and the Doctor heads back to the saloon , empty except for a blind man who tells him the townspeople are headed for the Browns ' home . The Doctor obtains a horse and heads there himself . At home , the Browns gather weapons and dynamite and prepare for a dinosaur attack . They are instead attacked by the hypnotised townspeople , led by Deputy Paul . Armed with sticks and tools , they attack Peri . The Doctor appears and rescues her , bringing her inside the house . The Doctor has an idea for dealing with the angry mob without hurting them . They will shock the townspeople out of their hypnotism . When the mob finally breaks through the door , they are confronted by the Doctor , Peri , Josh and the remaining Browns engaging in odd behaviour - singing , dancing , hugging , juggling , and barking . With the hypnotism broken , Josh orders them back home , and they comply . However , the Master has shown up with his hypnotised dinosaurs . Before he can order them to attack , the Doctor shoots him . The men rope the dinosaurs , and when the Master recovers from the gunshot , Josh loops one of the ropes around the Master , and sends the dinosaur connected to it on its way , with the Master dragging behind . Later , the Doctor goes to the cavern and sets up dynamite for the fountain . He buries the Fountain of Youth until some future time .