Arnold Schwarzenegger in Terminator GenisysTERMINATOR GENISYS

Following some requisite, necessary backstory, Terminator Genisys opens in 2029 Los Angeles, where resistance leader John Connor (Jason Clarke) transports fellow revolutionary Kyle Reese (Jai Courtney) to 1984, where he's to hopefully prevent global apocalypse and protect John's mother Sarah (Emilia Clarke) from a murderous robot (Arnold Schwarzenegger). Upon arriving, however, Kyle finds that Sarah doesn't need saving and the robot isn't murderous, so off they go to 2017, where the planet is still imperiled, and John Connor himself proves to be the source of the planet's eventual ruin. After one of these whisks through the decades, Kyle says, "Time travel makes my head hurt," and time-travel movies generally make my head hurt, too. But for a fifth installment in an increasingly confounding series, this particular time-travel movie is actually a fair bit of fun.

Blake Rayne, Ashley Judd, and Ray Liotta in The IdenticalDirector Dustin Marcellino's The Identical is for anyone who ever wanted to see a fictionalized account of the birth of the Elvis-impersonator movement. Or anyone who'd enjoy Presley's songs more if their melodies weren't so complex and their lyrics weren't so depraved. Or anyone who's been yearning to see Ray Liotta play a devout evangelist who explains to his congregation why he just lit eight candles on a menorah, when, as we can see, he clearly lit nine.

Adewale Akinnuoye-Agbaje and Kit Harington in PompeiiPOMPEII

About a half-hour into Paul W.S. Anderson's Pompeii, the film's protagonist - a gladiator-turned-slave amusingly named Milo - hears the unfamiliar sound of the nearby Mount Vesuvius preparing to erupt. "It is the mountain," says Milo's comrade Atticus. "It grumbles from time to time." So do movie reviewers, and this latest 3D action spectacle by the director of Mortal Kombat, Death Race, and a trio of Resident Evil flicks would, at first glance, appear to be exactly the sort of thing I'd personally grumble about: a predictably corny, derivative, overscaled costume party with loads of generic violence and nothing in the way of subtlety or emotional nuance.

Yet while it's easy to name the movie's most direct influences, Gladiator and Titanic chief among them, what I didn't at all expect was for this swords-and-sandals outing to be so thoroughly, cheerfully indebted to 1970s disaster epics in the vein of The Towering Inferno and The Poseidon Adventure; Pompeii, to its cheeky credit, is kind of like 1974's Earthquake with the ancient Roman city cast in the role of Los Angeles.