Banana Bananas were an Earth fruit . They were a good source of potassium . ( TV : " The Doctor Dances " ) Bananas were commonly associated with monkey s . ( TV : " Ghost Light " ) They included vasoactive amine s , which made some people such as Toshiko Sato vomit . ( TV : " Something Borrowed " ) According to the Ninth Doctor , a banana grove grew in Villengard on the former site of the weapons factories . ( TV : " The Doctor Dances " ) History . The Doctor . The Second Doctor , objecting to Dastari ' s augmenting an Androgum ' s intelligence , said that if one gave a monkey control of its environment , it would fill the world with bananas . ( TV : " The Two Doctors " ) Jo Grant brought a captive Ogron a banana . He did not comprehend her instructions to peel it . ( TV : " Frontier in Space " ) On Space Station Camera , the Sixth Doctor found a banana whilst searching his pockets for piece of wire . He gave the banana to Peri , who later started to eat it , but gave up when the sight of a dead Androgum made her feel sick . ( TV : " The Two Doctors " ) The Fourth Doctor expressed a fondness for bananas , once stopping Bolog ' s fleet with one . ( COMIC : " Death to the Doctor ! " ) The Ninth Doctor also expressed his fondness for bananas and briefly switched Jack ' s sonic blaster with one from Villengard to stop him from shooting at Jamie . ( TV : " The Doctor Dances " ) This incident caused Jack to joke that the Doctor had a " bananas only " policy , after the Doctor blew up his spare blaster . ( COMIC : " Weapons of Past Destruction " ) In his tenth incarnation , the Doctor still liked bananas . He claimed that while partying with Madame de Pompadour in 18th century France , he might have invented the banana daiquiri several centuries early . He also offered Rose the advice , " Always bring a banana to a party " . ( TV : " The Girl in the Fireplace " ) He also liked banana milkshake s . ( TV : " Smith and Jones " ) When he tried to stop Sky Silvestry from copying him , one of the things he mentioned was a banana . ( TV : " Midnight " ) During a visit to Blackwood Falls , the Tenth Doctor ate two banana splits in quick succession . ( PROSE : " Forever Autumn " ) He described a " Banana Surprise " . ( PROSE : " Martha in the Mirror " ) Once , when expecting to land on a sunny beach , he emerged from the TARDIS with an inflatable banana . ( PROSE : " Snowglobe 7 " ) While searching through the the Doctor ' s coat , Rose found a banana . ( PROSE : " The Price of Paradise " ) When the TARDIS entered conceptual space , the Eleventh Doctor said " Imagine a banana - or anything curved - actually , don ' t , because it ' s not curved or like a banana . Forget the banana ! " to Rory in an attempt to explain . ( TV : " Space " ) During a visit to ancient Egypt , he overturned a stall selling bananas while his companions and he were being chased . ( COMIC : " Assimilation² " ) In 1938 Berlin , he switched Melody Pond ' s gun with a banana to foil one of her attempts to kill him . ( TV : " Let ' s Kill Hitler " ) Others . Reverend Ernest Matthews was given a banana by Josiah Samuel Smith just before Josiah turned him into an ape . ( TV : " Ghost Light " ) Duncan Goode told Martha , " Don ' t judge a banana by its skin " . ( PROSE : " Wishing Well " ) Eugene Jones favoured banana milkshake s . ( TV : " Random Shoes " ) After being defeated by the Tenth Doctor , Bob Kreesus slipped on a banana skin and fell over a cliff edge . ( COMIC : " Triskaidekaphobia " ) When Ianto Jones was explaining automatic doors at the supermarket to Diane Holmes , John Ellis and Emma - Louise Cowell , the women were distracted when they spotted bananas . They were very excited to see so many on display , indicating bananas were difficult to come by in December 1953 . ( TV : " Out of Time " ) Jo Grant gave an Ogron prisoner a banana while en route to Earth in 2540 . When the Ogron ate it without peeling it , Jo said " I think you ' re supposed to peel it first " . ( TV : " Frontier in Space " )