John (Remembrance of the Daleks)

John was a Jamaican employee at a coffee shop in London in 1963.

John served the Fourteenth Doctor, Ian Chesterton and Barbara Wright on the 21st November 1963, and he asked them whether they'd like sugar in their tea, to which he received a rather strange but short response from the Doctor. (MOV: Doctor Who: Genesis)

A week later, John chatted with the Seventh Doctor about adding sugar to tea, as well, leading the Doctor to muse about the larger ripple effects that occur through time even from small decisions. John's father had worked in the sugar fields in Jamaica. (DW: Remembrance of the Daleks)

Behind the Scenes
Joseph Marcell played John in his initial appearance in ''Remembrance of the Daleks. Due to the Doctor receiving pshyic projections from the Matrix in Doctor Who: Genesis'', when John reappeared his was played by Paterson Joseph, who played the Twelfth Doctor.