When this TV movie kicks off with Ivy Levan sashaying her way around a cinema while she mimes to a pre-recorded and over-produced backing track of Science Fiction/Double Feature, full of licks and runs and finding four notes to hit where there used to be one, like a desperate X Factor wannabe who has no concept of the meaning of the lyrics she’s warbling but is ever so desperate to show she can saaang (that’s like singing but with added Cool), you get a pretty fair idea of the terrible experience about to be unleashed upon you by the not-so-catchily titled The Rocky Horror Picture Show: Let’s Do the Time Warp Again. That’s to say it’s been modernised, Americanised, and sanitised.

If you know the original then you know the plot, and if you don’t know the original then you have no business watching this so-called tribute version, which premiered on Fox in the US last week and makes its way to the UK on Sky Cinema from today. “Tribute” is the latest word someone has co-opted to avoid saying “remake”, a marketing strategy that was presumably settled upon after they realised they’d produced a witless, regressive clone of material that, though over 40 years old, is still more subversive and boundary-pushing than this plastic Disneyfied tosh.

The interpretation of the songs is appalling. The recordings are all overworked, full of needless warbles and added “oohs”. They’ve been modernised in such a way that, when current popular fads for over-singing things (“licks” or “runs” or whatever else they call them) have passed — as they surely will — these new versions will sound even more dated than the already-40-year-old originals, which have a certain timelessness. The lyrics are sung with the same amount of attention to what they mean as you get from a computer’s text-to-speech function, including or echoing parts of the original without understanding why they’re there or what function they perform; or if it does know the function, it doesn’t know how to replicate it.

To say its performances are like a bad am-dram production would be an insult to am-drammers everywhere. Almost everyone is miscast. It was, perhaps, a nice touch to include Tim Curry, but his limited scenes are uncomfortable to watch because it’s painfully obvious that the poor man is still labouring under the aftereffects of his stroke. As Brad, Ryan McCartan overacts as if he thinks that’s the whole point. Reeve Carney makes Riff Raff a leering creep, and his needless affected British accent is awful. As Magenta, Christina Miian’s is worse. As Frank, Laverne Cox’s imitative mid-Atlantic twang is even worse again. Why did they do it?! Presumably because, as I said, it’s all a thoughtless copy of the original.

The casting of a transgender woman as a transvestite is its own kettle of worms — either she’s a woman doing radical things like fancying men and being jealous of another woman stealing her guy, or you’re saying she’s not actually a woman but still a man and… well, like I say, it’s a mess. A commenter on the A.V. Club’s review summed up the cumulative effect quite succinctly: “Fox was actually able to pull off a pretty conservative casting choice while appearing uber progressive… By casting Cox, who identifies as female, in the role of Frank-N-Furter the seduction scenes actually became far less risqué”.

Everything is blunted further by Kenny Ortega’s ineffective direction. The camerawork is flat and uninteresting, the shot choices unimaginative. Some of the choreography looks interesting — it’s certainly more elaborate than in the original film — but the camerawork seems to be actively trying to obscure it. The editor must have struggled, unable to generate any additional excitement due to a shortage of options. At times it looks as if it was filmed live, under which circumstances its weaknesses might be understandable, if not excusable… but it wasn’t.

Occasionally there are cutaways to a cinema audience — not a real one, but a gaggle of extras, sat in a theatre watching what we’re watching. These moments are pathetic and pointless. I get that it’s meant to be a nod to the interactive midnight showings that have made Rocky Horror the phenomenon it is, but they demonstrate none of the wit or verve that make those screenings so popular. Plus the original film is good entertainment even without such intrusions; this isn’t. You might think that makes the asides necessary to liven it up, but there are so few of them, and they’re so lacking in imagination, or any discernible content whatsoever, that they just feel like they’re dragging the experience out even further.

Believe it or not, it’s not all bad. There’s one new gag in the dinner scene that’s actually pretty funny. It’s delivered by Faye Marsay lookalike Annaleigh Ashford, who makes a good fist of Columbia. Rounding out the leads, Victoria Justice has all the necessary charms to make a pretty fair Janet. I refer partly to her omnipresent cleavage, but also her acting. It’s not great by any means, but she’s suitably sweet and twee at the start, then manages to sell Janet’s near-instantaneous transformation from uptight goody-two-shoes to sex-mad strumpet using just a handful of expressions and line deliveries in the slight gap her character has between Over at the Frankenstein Place and Touch-a Touch-a Touch Me. The latter is one of the film’s rare highlights, for various reasons. One of those is actually Staz Nair as Rocky — undoubtedly the least challenging role in the piece, but at least he gets it right, and his musclebound chest counterbalances Justice’s for those of the other persuasion. The only downside are his tattoos: he was supposedly just grown in a tank, how does he have tattoos?!

More than the ’75 film, Let’s Do the Time Warp Again brings to mind the 2010 episode of Glee that essayed the same musical. If you suffered through The Rocky Horror Glee Show, as I did, you’ll know it was a travesty. Is this even worse? Well, that’s a bit like someone forcing you to eat a dog shit and a cat shit before asking you which tasted nicer. That’s a little unfair: the Glee version was meritless; this one has a couple of minor plus points — so maybe it’s like someone making you eat a very small shit while occasionally showing you a picture of a sexy half-naked person. But unless someone forces you to choose between only this and Glee, there’s no earthly reason to do this particular Time Warp again.

The Rocky Horror Picture Show: Let’s Do the Time Warp Again is available on Sky Cinema from today, screening on Premiere at 12:25pm and 8pm.

It featured on my list of The Five Worst Films I Saw in 2016, which can be read in full here.