The Lost World (1960)

Directed by Irwin Allen
Based on The Lost World Sir Arthur Conan Doyle
Written by Charles Bennett and Irwin Allen
Starring Michael Rennie, Jill St. John, David Hedison, Claude Rains, Richard Haydn, Ray Stricklyn, Fernando Lamas, and Vitina Marcus
The conceit of Sir Arthur Conan Doyle’s The Lost World is enthralling. Explorers discover a region that stands apart from the modern world, where evolution stood still; a place where tribes battled apes—sure, he was ripping off Jules Verne to some extent, but who didn’t? And it is Doyle’s title that we use to describe plots that involve isolated pockets of prehistoric life. It’s been filmed many times but only once was it done by the master of disaster, director and producer Irwin Allen.
Arachnid (2001)

Directed by Jack Sholder
Written by Mark Sevi
Starring Chris Potter, Alex Reid, José Sancho, Neus Asensi, Ravil Isyanov, and Luis Lorenzo Crespo
It feels like most of the time we see giant spiders in the wild, they’re in caves. Certainly when they’re the focus of the plot, they’re in or approaching population centers. The one in Arachnid is an outlier in a number of respects, but primarily for spending the entire film on a tropical island.
Spiders (2000)

Directed by Gary Jones
Written by Boaz Davidson, Stephen David Brooks, Jace Anderson, and Adam Gierasch
Starring Lana Parrilla, Josh Green, Oliver Macready, Nick Swarts, Mark Phelan, and Leslie Zemeckis
Ever since H.G. Wells wrote The Food of the Gods, scientists have been creating bigger spiders. Usually it’s in the pursuit of better nutrition, but every now and then it’s a straightforward attempt to weaponize arachnids. The film Spiders is the first entry in a series of movies based on this inadvisable weapons program.
Krull (1983)

Directed by Peter Yates
Written by Stanford Sherman
Starring Ken Marshall, Lysette Anthony, Freddie Jones, Francesca Annis, Alun Armstrong, David Battley, Bernard Bresslaw, Liam Neeson, John Welsh, and Robbie Coltrane
When I think of swashbuckling, I picture fantastic adventure and daring heroes, such as Sinbad and Robin Hood. The Buck Rogers comic strips and serials brought the sensibilities of the style into the realm of science fiction, and Star Wars launched a powerful franchise out of the mixture of fantasy, adventure, and technology. There have been quite a lot of imitators, but few ever approached the delightful world-building or production values achieved by Krull.
World Without End (1956)

Written and Directed by Edward Bernds
Starring Hugh Marlowe, Nancy Gates, Nelson Leigh, Rod Taylor, Shirley Patterson, Lisa Montell, Christopher Dark, and Everett Glass
One of the most enduring science fiction stories is The Time Machine, by H.G. Wells. Apart from popularizing the notion of time travel, it influenced the way we think about the future in terms of what will become of the human race and its civilizations. Humanity splits in two, with the Eloi physically dwindling and living in shiny towers while the Morlock grow strong laboring underneath. While Wells’ work stressed the division between the working and ruling classes, others would use the premise to make their own statements. The film World Without End uses the threat of nuclear war to create a future where humans on the surface are enslaved by mutants while those who sheltered below ground are failing to thrive.