B.L.T. - God Is Love

Good day, gentlemen. This is a prerecorded briefing, made prior to your departure, which for security reasons of the highest importance has been known on board during the mission only by your HAL-9000 computer.

Now that you are in Jupiter's space, and the entire crew is revived, it can be told to you. Eighteen months ago, the first evidence of intelligent life off the Earth was discovered. It was buried 40 feet below the lunar surface, near the crater Tyco. Except for a single very powerful radio emission aimed at Jupiter, the four-million-year-old black monolith has remained completely inert.

Its origin and purpose... are still a total mystery.