The War Games marked the end of an era for the Second Doctor (Patrick Troughton) and his companions Jamie (Frazer Hines) and Zoe (Wendy Padbury).
The trio land in a battlefield that appears to be a World War One military zone. But all is not as it seems.
Russell T Davies, Doctor Who showrunner, said: “From the day I arrived back on Doctor Who, this was the plan – to colourise old stories and bring them back to life.
“It looks so vivid and new.”