Admiral Kirk and his fugitive crew must return to the federation, to face the crimes they committed in the previous movie. However, when a mysterious alien probe comes that could wipe out the federation, Spock deduces the only species capable of communicating with it are the long since extinct humpback whales.

Therefore, Kirk orders his crew to go back in time to the 20th century, in order to get the whales of the past, to save their future.

Many people do not realise what a very serious problem thrown away plastic really is because it is killing millions of marine animals every year. Amongst the ones that can die after eating flotsam such as plastic bags are many species of whales, and these magnificent marine mammals have been already endangered by whale-hunters. Plastic doesn't biodegrade and vast amounts of the material are floating about in the seas.

Narwhals - the unusual horned whales - are small Artic cetaceans. They are famous for the enormous 'unicorn' horn growing out of their heads. For a narwhal lover, there isn't much available to buy, but there are a few toys and children's books worth considering, as well as some odd collectibles.