Those horror viewers familiar with Lucio Fulci's extremist work in the zombie subgenre of horror might be surprised by the subtle, plot-driven thrillers he made at the turn of the 1970's. Una Sull'Altra is a memorable example of his work around this time thanks to its blend of a clever storyline and stylish direction. Fans of Dario Argento's "giallo" thrillers will find plenty to enjoy here: Fulci hits just the right blend of suspense sequences and crafty plot twists, couching it all in impressive imagery that makes effect use of the film's lovely San Francisco setting. Una Sull'Altra also offers strong performances by a game cast: Jean Sorel is believable as an easily-distracted playboy who may or may not be a killer, Elsa Martinelli brings a convincing air of frustration to the role of Sorel's long-suffering mistress and Eurocult favorite Marisa Mell is bewitching as the mysterious go-go dancer who gets caught in the middle of the couple's romantic struggles. The end result isn't quite as masterful as Argento or Mario Bava's best giallo outings but Una Sull'Altra is a worthy, well-crafted outing that fans of the genre will find impressive.