This film is the fourth film of the franchise and clearly addresses a naturalistic theme, very dear of this time, when ecological movements began to be noticed. In fact, the script itself consists of a trip to the past to save the last representatives of a certain species of whales. Obviously the issue around time travel is pure science fiction and the way the Enterprise craft does this seemed unlikely, but everything else is extremely positive in the movie. I loved the way the script made comedy with the shock of the future travelers (especially Dr. McCoy) with our social and technological backwardness. These moments of humor are the strongest and most appealing point of this film. The technical details of the film are roughly the same as the previous films, in particular with regard to the special effects that these days do not seem very surprising due to the computer effects we get used to. And as for the actors it can be said that it is the film of DeForest Kelley par excellence, in that the actor gets some of the most memorable scenes. The remaining cast, however, live up to our expectations, contributing to make this film a worthy continuation of the franchise.
