Soyuz 7K-TK (Russian: Союз 7К-ТК meaning Union 7K-TK) was a proposed Soviet spacecraft, which was designed for delivering cosmonauts to Soyuz R piloted military stations.
Because Sergei Korolev, head of the OKB-1 bureau, had died in surgery in January 1966, the Soyuz 7K-R project was cancelled.
Potential was still seen in the Soyuz 7K-TK, and so control of the project was handed over to Vladimir Chelomey's bureau to be developed as a transport spacecraft for the Almaz program.
Due to the delays in the Almaz program, further development of the 7K-TK was suspended in December 1966.
However, due to further delays and the Chelomey's preference of the TKS spacecraft in June 1970, the Soyuz 7K-TK program was cancelled and never reached flight.