Pay no heed to the somewhat disparaging reviews here on IMDb: although The Iguana With The Tongue of Fire fails to live up to its wonderfully evocative title thanks to a rather mediocre storyline and a lacklustre finale, there is still much to entertain fans of the genre. Director Riccardo Freda's film features a decent cast, atmospheric location work in Ireland and Switzerland, some gnarly violence, silly red herrings aplenty, a little action, and a touch of sleaze, making this one fun despite the drawbacks of the plot.
The film stars Luigi Pistilli as Detective John Norton, whose investigation into the murder of a young woman (who has her face ruined by sulphuric acid and her neck sliced with a cut-throat razor in the gory opener) sees him becoming personally involved in the case after he develops a relationship with Helen (Dagmar Lassander), sexy daughter of the prime suspect, Swiss diplomat Ambassador Sobiesky (Anton Diffring). As the bodies continue to pile up, Norton's own mother and teenage daughter find themselves at risk...
From its gruesome opening, to the spectacular demise of the film's killer, The Iguana With The Tongue of Fire is trashy fun and should appeal to those who love their giallos bloody and sleazy; if the likes of The New York Ripper and Strip Nude for The Killer float your boat, you'll most likely get a kick out of this one too. In addition to the juicy razor attacks, we also get a 'decapitated cat in a fridge' gag, and Norton's mother having her head bashed in, while the nudity includes Lassender getting her top off for a brief sex scene, and Norton's daughter being attacked while just in her knickers (her childish dubbed voice making this scene a tad uncomfortable to watch).
The film also offers some great unintentional laughs: the woeful 'Oirish' dubbing will no doubt illicit some chuckles, as will the numerous red-herrings (everyone seems to own a pair of sunglasses, a cut-throat razor, or leather gloves) which, as if they're not blatant enough, are accompanied by a crashingly loud sound effect that really drives the point home—this is a possible clue and the owner of the item in question could be the killer!!!! The final reveal of the murderer's identity and his convoluted motive for killing are suitably daft—the icing on the whole silly giallo cake.