Star Trek 4 the Voyage Home.

In 1986 the crew of the ill fated USS Enterprise NCC 1701 slingshot around the sun aboard a Klingon ship to earth of the past. Kirks crew are called back to earth to face nine criminal charges of Starfleet regulations. Its looking pretty serious for our Enterprise buddies who decide to face the music. Along the way the HMS Bounty encounters a mysterious alien probe of unknown origin threatening to destroy all life on Earth. The probe is apparently calling out to humpback whales and vaporising earths oceans and atmosphere in the process. Spock quickly surmises Earth's predicament. SPOCK: Fascinating. If my suspicion is correct, there can be no response to this message. Why? Because the Probes transmissions are the songs sung by whales! Isn't that wonderful?

Image Creator/Owner: Paramount Pictures and or CBS Studio

Star Trek IV the Voyage Home is a delightful, fun movie with Whalesongs! Its rebel crew and a light hearted Mr Spock (not exactly firing on all thrusters) attempt time travel in search of two humpback whales. George and Gracie. When the HMS Bounty lands in the City by the Bay, Sulu engages the Cloaking Device. San Francisco is the focal point in time where Starfleet's finest beam down and begin their rescue operation. Scotty builds the whale tanks with transparent aluminium and re-energizes the de-crystallising dilithium crystals using high energy photons drained from a 'nuclear wessel.' Mr Spocks colorful metaphors and Kirk's "Well, double dumbass on you" demonstrates the lighter plot of the movie which fans totally enjoyed.

KIRK: That's all there is. Don't splurge. All set? Good hunting. ...Well, Spock, here we are, thanks to your restored memory and a little bit of good luck, we're walking the streets of San Francisco looking for a couple of humpback whales. How do you propose to solve this minor problem?
SPOCK: Simple logic will suffice. I believe I shall begin by making use of this map. I have the distance and bearing which were provided by Commander Uhura. If we juxtapose our coordinates we should be able to find our destination. It lies at two eight three point seven degrees...
(a bus with an advertisement on the side pulls up). I love watching this movie because during the voyage we get to enjoy the hilarious comedy as the crew fumble around in twentieth century San Francisco. The interplay between Spock, Kirk and Dr McCoy is priceless with Dr Mc Coy going off the deep end for good reason.

McCOY: Are you sure this is such a bright idea?
KIRK: What do you mean?
McCOY: Him? I mean him (Mr Spock), back at his post, like nothing happened. I don't know if you've got the whole picture but he isn't exactly working on all thrusters.
KIRK: It'll come back to him.
McCOY: Are you sure? ...That's what I thought.