All the evidence of a crime is presented at the beginning of each episode in a videotaped evidence log. The story then goes back in time and shows each clue as the crime is committed.
It's 1999 and a base has been built on the Moon. Moonbase Alpha safeguards the nuclear waste shipped from Earth and carries out research. Moonbase Alpha is staffed with 311 crew members. On September 13, 1999, disaster strikes. The nuclear waste explodes, in a chain reaction, and the Moon is hurled out of Earth's orbit, into deep space.
The show was about a team of secret agents called the Impossible Mission Force, or the IMF, who go on covert missions to fight and defeat Syndicate crime lords and evil dictators.