East Germany was a nation, part of the Soviet Union opposing the rest of the former Allies and West Germany, created by the separation of Germany following the Second World War. During the Cold War, a barrier known as the Berlin Wall separated West Berlin from East Berlin and East Germany as a whole. (AUDIO: Protect and Survive)
In 1962, a British agent named Stempfer was stationed in East Berlin where he intercepted Soviet plans to place missiles in Cuba. He gave the information to the Fourth Doctor. The Doctor sent him back to find out more, but Stempfer was discovered and killed by the Jalaphron. (PROSE: Checkpoint)
In 1965, Group Captain Ian Gilmore, Professor Rachel Jensen and Sir Toby Kinsella visited both West Berlin and East Berlin to investigate reports of UFO sightings and smuggled footage of an alien making contact with Soviet agents. Both turned out to be incidents of Soviet misinformation. (AUDIO: Unto the Breach)
East Germany ceased to exist when democratic uprisings in the Eastern Bloc countries resulted in the fall of the Berlin Wall on 9 November 1989 as well as the reunification of Germany. (AUDIO: Protect and Survive)
The Doctor once obtained a Trabant in East Germany, which he would drive in his eighth incarnation. (PROSE: Father Time)