Some fantasies are probably built on the idea of two Jake Gyllenhaals. In "Enemy," however, two Gyllenhaals lead to creepy adultery and nightmares of giant spiders.

The actor, earning high praise in this week's theatrical release, "Nightcrawler," is riding a wave of stirring performances in movies like "Prisoners" and "End of Watch." He reteams with "Prisoners" director Denis Villeneuve for "Enemy," a sexually charged thriller about an introverted professor who meets his exact look-alike, a philandering small-time actor (both played by Gyllenhaal, of course). The movie is available on video and for streaming on Amazon Prime.

The movie is darkly lit and scored with screeching instrumentals, adding a lot of atmosphere to the slow-build plot. Once the Gyllenhaals meet, the film gets... weird. Villeneuve has some interesting thematic ideas, but the film's abrupt ending will confound some viewers. Still, Gyllenhaal provides two subtle and contrasting performances that are worth a look.

A little lighter on the spectrum but still veering into horror tropes, the Jesse Eisenberg-led "The Double" also deals with nefarious doppelgangers. Quiet office worker Simon James (Eisenberg, channeling his awkward "Adventureland" persona) is horrified when his exact look-alike, James Simon (Eisenberg, channeling his egomaniacal "Social Network" persona), arrives as a new employee, and nobody notices the facial similarities. James becomes a star at the office, stealing Simon's work and wooing Simon's longtime crush (Mia Wasikowska).

The film, directed by British comedian Richard Ayoade, has a lot of cringe-inducing laughs squeezed between some sinister plotting, and while Eisenberg is terrific in both parts, Wasikowska steals the movie as the soulful girl next door who winds up victimized by both Eisenbergs.

Both "Enemy" and "The Double" take surreal turns, but I give the edge to "The Double" for seeing its premise through to a more resonant conclusion. "The Double" is on video and available for streaming on Netflix Instant.

• Last minute Halloween recommendations

Already the best place for online film commentary, AVClub.com has been killing it this week with a series of horror related posts. Between a lengthy analysis of villainous televisions (think "Poltergeist" and "Ringu") and a rundown of the best head explosions on film, writer Kyle Fowle provides a detailed history of the goth horror production studio, Hammer Films.

They're responsible for a series of memorable, British horror features, including "Curse of Frankenstein," though modern audiences can see their stylistic flourishes in the underrated "Woman in Black," starring the former Harry Potter, Daniel Radcliffe.

Fowle provides a list of Hammer essentials, including "The Woman in Black." The 1970 entry, "The Vampire Lovers," is the only title on the list available for Netflix streaming. Search "Hammer Films" on AVClub.com, then seek out something from the catalog.

• November Netflix Highlights

The streaming service is spreading out its big releases next month, but the most recent seasons of comedies "It's Always Sunny in Philadelphia" and "Portlandia" debut on Saturday. Keep an eye out for the insane sci-fi actioner "Snowpiercer," starring Chris Evans, available now.

Tyler Wilson can be reached at [email protected].