My review was written in July 1989 after watching the film on Prism video cassette.
Named after a famous Gene Autry serial, "The Phantom Empire" is an affectionate nod to old-time lost world sci-fi pics, which should amuse home video fans.
Helmer Fred Olen Ray shot this 1986 picture on a shoestring budget, ingeniously making up for lack of resources by stressing snappy dialog and in-jokes (even Robby the Robot pops up as a bad guy).
Plot is simple: after a mutant creature emerges from a cave and kills two picnickers, Susan Stokey hires salvage experts Ross Hagen and Dawn Wildsmith to mount an expedition into the caves to search for the lost city of Rilah.
Robert Quarry and Jeffrey Combs tag along as mineral experts. Crew finds a race of mutants, plus beautiful girls in bikinis led by Michelle Bauer, Sybil Danning pop s up as a queen from Outer Space mining for diamonds to fuel her crashed spaceship on the return trip home.
There's some fun animated footage of dinosaurs plus endless chasing around, but pic mainly works via the tongue-in-cheek dialog exchanges of its cast, most of whom are cult favorites from fantasy and horror pics.
Wildsmith is in particularly good humor, cracking sarcastic jokes in a tough-girl role. Bauer is funny in exaggerated mime as, with no knowledge of English, she's pressed into service as the expedition's guide. Danning has one of her better, campier, latter-day roles in a flashy black leather outfit.