Best Science Fiction Movies of 1978

Matthew Bennell notices that several of his friends are complaining that their close relatives are in some way different. When questioned later they themselves seem changed, as they deny everything or make lame excuses. As the invaders increase in number they become more open and Bennell, who has by now witnessed an attempted 'replacement', realises that he and his friends must escape or suffer the same fate.

Nazi hunter Ezra Lieberman discovers a sinister and bizarre plot to rekindle the Third Reich.

A government agent is determined to come to his son's rescue, when a sinister official kidnaps him to harness his extremely powerful psychic abilities.

When flesh-eating piranhas are accidently released into a summer resort's rivers, the guests become their next meal.

Tony (Ike Eisenmann) and Tia (Kim Richards) are other-worldly twins endowed with telekinesis. When their Uncle Bene drops them off in Los Angeles for an earthbound vacation, a display of their supernatural skill catches the eye of the nefarious Dr. Gannon (Christopher Lee) and his partner in crime, Letha (Bette Davis), who see rich possibilities in harnessing the children's gifts. They kidnap Tony, and Tia gives chase only to find Gannon is using her brother's powers against her.

A French detective in London reconstructs the life of a man lying in hospital with severe injuries with the help of journals and a psychiatrist. He realises that the man had powerful telekinetic abilities.

After the destruction of the Twelve Colonies of Mankind, the last major fighter carrier leads a makeshift fugitive fleet in a desperate search for the legendary planet Earth. This film is adapted from a television series that aired on ABC from September 17, 1978, to August 17, 1980. The first and fifth episodes of the series were edited into this theatrical feature film. Taken together, the two episodes ran 148 minutes, without commercials, while the film runs 125 minutes.

Hardware Wars (1978) is a short film parody of the classic science fiction film Star Wars. The thirteen-minute film, which premiered in theatres only seven months after Star Wars, consisted of little more than inside jokes and visual puns that heavily depended upon audience familiarity with the original. The theme song is Richard Wagner's famous "Ride of the Valkyries". The tagline was "You'll laugh, you'll cry, you'll kiss three bucks goodbye."

Attack of the Killer Tomatoes is a 1978 comedy film directed by John De Bello and starring David Miller. The film is a spoof of B-movies. Made on a budget of less than USD $100,000, the story involves tomatoes becoming sentient by unknown means and revolting against humanity.