An Avanti was filmed on a street in San Francisco for the fourth Star Trek movie, The Voyage Home (1986). The 1973 Avanti II owned by De Forest Kelly, who played Dr. McCoy, was filmed on location but these scenes were apparently cut from the final theatrical release. Star Trek IV brings Kirk, Spock, McCoy, Scotty, Sulu, Uhura, and Chekov from the 23rd century to present-day San Francisco. In their own time, the Starfleet crew encounter an alien probe emitting a mysterious message—a message delivered in the song of the now-extinct Earth species of humpback whales. Failure to respond to the probe will result in Earth's destruction, so Kirk uses time-travel to transport a captured Klingon starship to 20th-century Earth. The crew manages to transport a humpback whale to the future in an effort to peacefully communicate with the alien probe. Leonard Nimoy directed. The "Star Trek" Avanti is undergoing a customized restoration by Matthew Chess. Its amazing transformation is documented here: Dr. McCoy's Avanti. Matthews's "project" would look perfect in a future Star Trek movie!