Carter ( Let ' s Kill Hitler ) Carter was the captain of the " Teselecta " . Berlin . Carter and his crew first encountered the Eleventh Doctor in Berlin , 1938 , shortly before the Second World War . Carter had arrived there with the intention to give Hitler hell , but was interrupted when the the Doctor ' s TARDIS , with the Doctor , Amy , Rory and Mels crashed into Hitler ' s office . When they saw Mels , who had regenerated , they recognised her as Melody Pond and stopped their pursuit of Hitler to punish her instead ; knowing that she was the woman who would kill the Doctor . They were thwarted by her parents , Amy and Rory , who after being minaturised into the " Teselecta " , turned off the devices protecting the crew from the ship ' s antibodies . The crew teleported to a spaceship above the Earth , abandoning the " Teselecta " , which was used to show Melody that she would become River Song , a good friend of the Doctor and his companions . This helped Melody to resist her childhood programming as the Silence ' s assassin . The Doctor also had it reveal the Silence ' s purpose and extracted data from it regarding his death . ( TV : " Let ' s Kill Hitler " ) Lake Silencio . The Doctor next encountered Carter and the " Teselecta " when he neared the end of his " farewell tour " . He met with Father Gideon Vandaleur , former envoy of the Silence , soon revealing that he knew Vandaleur had been dead for six months and he was the " Teselecta " in disguise , deducing that the " Teselecta " was investigating the Silence . The Doctor made Carter do him some favours . First , he had him identify the Silence ' s weakest link , so he could find out why he had to die , and second , to deliver the " Tardis blue " envelopes to Amy and Rory , River Song , Canton Everett Delaware III , and the Doctor himself when he was only 909 years old , these envelopes being invitations to his death at Lake Silencio . ( TV : " The Impossible Astronaut " ) Carter then effectively saved the Doctor ' s life when he offered him an extra favour as thanks for the Doctor ' s unending crusade for justice . Per the Doctor ' s request , Carter had the " Teselecta " copy the Time Lord and beam him in . Allowing the Doctor control of the ship to fulfil the circumstances of his " death " , Carter had the " Tesselecta " go to Lake Silencio on 22 April 2011 , where River Song was to kill the Doctor . Following the " murder " , Carter let the Doctor out of the " Tesselecta " . His crew and he kept this escapade quiet from the Justice Department , not only to avoid adverse consequences , but to keep the Silence from constantly trying to kill the Doctor . ( TV : " The Wedding of River Song " ) Personality . Carter was a well meaning man who was extremely devoted to justice . He respected the Doctor , seeing him as a master of law and order and offered to help him before the Doctor headed to Lake Silencio to die . Carter saved the Doctor ' s life by allowing him to use the Tesselecta to fake his death , telling the Doctor that despite what he thought of them , the " Tesselecta " and her crew were champions of law and order like the Doctor . His respect was great enough that he and his crew kept what they did a secret from everyone else . However , despite his good intentions , Carter often tortured people if he felt they deserved it , showing no concern about the agonising pain he put them through . He could also be very ruthless and was willing to kill people without any remorse . Because of this the Doctor respected the Captain of the Tesselecta less than Carter respected him . ( TV : " Let ' s Kill Hitler " , " The Wedding of River Song " )