Final answer:
Mikhail Gorbachev was the Soviet Premier who introduced Glasnost and Perestroika, leading to the end of Soviet satellites and communism in Eastern Europe.
Step-by-step explanation:
The Soviet Premier who spoke of Glasnost and Perestroika which led to the end of Soviet satellites and communism in Eastern Europe was Mikhail Gorbachev. These policies of openness and economic restructuring could not prevent the collapse of the Soviet system between 1989 and 1991 despite being implemented with hopes for rejuvenation. Gorbachev, realizing the pressing need for reform in the face of economic and political turmoil, pushed for more openness in the political sphere and a restructured economy, yet these changes inadvertently expedited the dissolution of the USSR and the end of Soviet influence over Eastern Europe.