Planet of Dinosaurs is a 1977 science fiction film. Set in an unspecified future, the film follows the journey of Captain Lee and his crew after they crash land on a planet with similar life conditions as Earth, but millions of years behind in time. Encountering a wide variety of dangerous dinosaurs, the crew decides that its best chance for survival lies on finding higher ground and setting up a defensive perimeter on a higher plateau for refuge to wait for when (or if) their rescuers arrive. They soon encounter a deadly Tyrannosaurus and must figure out a way to defeat the creature and survive on the planet.
https://en.wikipedia.org/wiki/Planet_of_Dinosaurs
According to wikipedia, most of the budget went to the stop-motion, which is generally what people consider the best part of this movie.
But I got to put a word in for the soundtrack. It is outtasight, like ahead of its time, almost in the same league as the Tron soundtrack 5 years later.
The acting is terrible, but the script, while definitely B-movie level, is not that bad and recalls pulp-era sci fi and Star Trek TOS.
Overall a really good example of a B-movie.