Jerry Lewis is Kreton, a childish alien who, against his teacher's will leaves his planet to visit the Earth, and lands in the backyard of a famous television journalist who doesn't believe in U.F.O's and aliens. Wanting to study humans but not able to fully understand them, Kreton makes a mess out of it, generating a lot of comic situations.

On January 5, 1900, a disheveled looking - George to his friends - arrives late to his own dinner party. He tells his guests of his travels in his time machine, the work about which his friends knew. They were also unbelieving, and skeptical of any practical use if it did indeed work. George knew that his machine was stationary in geographic position, but he did not account for changes in what happens over time to that location. He also learns that the machine is not impervious and he is not immune to those who do not understand him or the machine's purpose. George tells his friends that he did not find the Utopian society he so wished had developed. He mentions specifically a civilization several thousand years into the future which consists of the subterranean morlocks and the surface dwelling eloi, who on first glance lead a carefree life. Despite all these issues, love can still bloom over the spread of millennia.

Ramon the alligator is flushed down the toilet as a baby and grows into a gargantuan monster by eating the corpses of laboratory animals who have undergone dubious hormone experiments, thus providing all the ecological and social subtext that one could possibly wish for, even if one doesn't normally go for films about giant alligators eating people left, right, and center--which is the inevitable and tragic result of Ramon's decision that the outside world looks rather more interesting than the sewers....

Strange things are happening in Riverdale, Illinois. A huge, seemingly alien structure has been found jutting out of the earth. Sent to investigate the origin of the mysterious object, Senator Walter Powers discovers that parasites from the center of the earth have infiltrated the town, taking control of the authorities and workers, making communication with the outside world impossible, and leaving the responsibility of stopping the invasion up to Powers and a small group of free individuals.

Before he died, Dar's father gave a mysterious amulet to Tal, Dar's younger brother who is now king. Dar, while wandering with his animal companions, chances to meet and rescue a family who seek the help of King Tal against Lord Agon, a sorcerer who has conquered their land. Dar obtains an audience for them with Tal, who rallies his troops to march against Agon in the morning. Alas, the young king is captured by Agon's crimson warriors during the night. It is the amulet -- the Eye of the imprisoned god Braxus -- that Agon really wants. But Dar now carries half of it, and is nowhere to be found. Will he fall into Lord Agon's clutches when he comes to free his brother?