Midnight Science Fiction Feature!

Midnight Science Fiction Feature! is the main intro quest in the Fallout: New Vegas add-on Old World Blues.

Quick walkthrough

 * 1) Go to the Mojave Drive-in.
 * 2) Wait until midnight.
 * 3) While the movie is playing, activate the crashed satellite.

Detailed walkthrough
After installing the add-on, you will receive a radio signal from a mysterious broadcast about an invitation to the "Midnight Science Fiction Feature!" in the Mojave Drive-in. After arriving at the Mojave Drive-in, you will notice a crashed satellite in the middle of the drive in lot. At midnight, the satellite starts projecting a movie (which appears to be a peering eye) on the Mojave Drive-in's screen. Activating the satellite at this point will bring up the prompt window, explaining that you're about to enter, and won't be able to return until completion. Selecting that you are ready will cause you to be teleported to the Big Empty and start the Old World Blues content.

Behind the scenes

 * This is most likely a reference to the midnight movies of the 1950's, when television stations would show low budget horror and science fiction films at midnight. The trend then took off again in the 1970's and 1980's at theaters, the most well known example of a "midnight movie" is The Rocky Horror Picture Show.