The Glittering Dark is a near-great musical carrying a genuinely great performance, and that gap is what I want to talk about.

Valentina Cruz plays Margot Harlowe, a 1940s Broadway fixture facing the end of her career after a vocal cord hemorrhage leaves her unable to sing for nearly two years. Book writer Delia Ashworth has given her a role with real architecture — not just a comeback story but a reckoning with what happens to women in theater when their utility expires. Director Miles Fontaine keeps the production gorgeously controlled in Act Two, where scenic designer Ren Okafor’s set opens like a flower — a slow, deliberate revelation as the stage’s back wall peels away to expose the theatre within the theatre, Margot returning to the boards as the audience leans forward to meet her.

That Act Two staging is the most elegant thing in the show.

But mija — Act One.

Ashworth and Fontaine seem to have made a collective decision to keep Margot at arm’s length for the first seventy minutes, letting her be observed, managed, and pitied by the ensemble rather than letting her drive. I can see the logic — building the pressure cooker before the lid blows — but the result is that we spend too long watching other characters react to Margot instead of watching Margot. When Cruz finally takes the stage for “What the Body Knows” at the end of Act One, the applause feels like relief as much as appreciation.

Because here is the thing about Valentina Cruz: she has one of those voices where the technique disappears. You stop hearing breath support and placement and start hearing a woman. When she sings, you don’t think about singing — you think about Margot. The final eight bars of “What the Body Knows” were the kind of moment where the orchestra stopped mattering, the set stopped mattering, the cough from row G stopped mattering. The St. Claire went completely still. That kind of quiet — the kind an audience makes when they are collectively holding something precious — is not something you manufacture. You cannot design it into a show. Either you have a performance that earns it or you don’t.

Cruz earns it.

The supporting company is uneven. Dario Alvarado as Margot’s accompanist Bernard is the best of them — there’s a physicality to his performance, the way he sits at the piano like a man who has been apologizing for thirty years and finally stopped. His scene with Cruz in Act Two, where they argue over a replacement aria, is the most human ten minutes in the show. Elsewhere, the ensemble is competent and a little flat, which might be a direction problem or might be that the material doesn’t give them much to stand on.

Rowan Salcedo’s score is better than it will get credit for. The orchestrations — spare strings in Act One, full brass opening up in Act Two — do exactly what good orchestrations should: tell you what emotional territory you’re in before the character opens her mouth. But Salcedo has one ballad too many in Act One, and two of them sound close enough that I had to check my program to confirm they were different songs.

Look — you should go see this show. Go because Valentina Cruz is doing something that doesn’t come along every season, because the second act pays off more than it has any right to given the groundwork, and because the St. Claire deserves your ticket money when it’s programming work this ambitious. Bring patience for an Act One that is still learning to trust its own star. Once it does, and once Cruz is fully unleashed, The Glittering Dark earns every minute.

The show Miles Fontaine and Delia Ashworth almost made is good. The show Valentina Cruz is actually performing is something else entirely. Go for her. Stay for everything.

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