Remember the 5-part Netflix thriller with one of the greatest casts?
Netflix’s thriller slate is bursting, but it’s the 2025 series with a properly starry, talent-packed cast that ought to have your attention.
If you ever wonder what actually goes on behind the gates of some glossy lakeside mansion, Sirens on Netflix had a good go at answering — or at least stirring up the question. This was one of those series that slipped out in early 2025 and then promptly got buried, only popping up again when someone goes trawling for dramas with a bit more bite than your average posh-people-in-trouble hour. But honestly, it deserves more attention than it got at the time.
Netflix released all five episodes of Sirens in February 2025.
Proper Cast, Proper Performances
The big draw here, and what makes it stick, is the cast. Julianne Moore (who never chooses dull) leads as Michaela 'Kiki' Kell, owner of a mansion, harbouring secrets, and genuinely the type you half-want at your dinner party but also terrify you. Alongside her is Kevin Bacon as her husband Peter — a chap who manages to be both a mystery and a liability, depending on the moment. On the other side of the class divide are two sisters: Milly Alcock, fresh from that Supergirl reboot, plays Simone DeWitt, who works as Michaela’s assistant; Meghann Fahy is her sister Devon, who shows up one fateful weekend. As is usually the case, Devon's visit sets off a chain of chaos, secrets, and that old chestnut: family drama that is way messier than anyone wants to admit.
- Julianne Moore as Michaela "Kiki" Kell
- Kevin Bacon as Peter Kell
- Milly Alcock as Simone DeWitt
- Meghann Fahy as Devon DeWitt
If that line-up sounds like an overqualified dinner party, that's because it basically is. All four get the sort of characters you can’t quite pin down — sometimes sympathetic, sometimes the absolute worst. That ambiguity's intentional and, for once, properly acted instead of just written in the script and left dangling.
Old Play, New Tricks
Molly Smith Metzler (she did Maid for Netflix, if you recognise the name) adapted Sirens from her stage play Elemeno Pea. The show keeps some of its theatrical roots: the action is tight, brutally focused, and there are only five episodes, so no pointless meandering. It's a fast watch but still packed with enough twists to keep you on your toes — sometimes veering a bit wild, to be honest, but I'd argue that's half the point.
The premise sets up the tension straight off: Simone's living this seemingly enviable life working for Michaela, until Devon rocks up and cracks appear everywhere. Michaela’s not what she seems, Peter is an enigma, and both DeWitt sisters keep doing things that would drive any parent to distraction. There’s no easy villain reveal (and zero spoilers here), so you’re left second-guessing everyone’s motives, sometimes even your own. It’s a bit more cynical and less clean-cut than, say, a Harlan Coben international mystery, and some found it melodramatic or overly dramatic. But for me, the messiness is what makes it tense rather than just silly.
The other reason Sirens sticks in the mind is that it actually does the big themes — sibling rivalries, the complications of money, people playing roles to survive — without ever slowing down for a monologue about The State Of The World. You get snippets of what it's like to grow up feeling overshadowed or overlooked, and nobody gets let off with a tidy ending. Probably why people either loved it or thought it was too much. For those who like seeing actors do the kind of work awards shows always ignore, it’s well worth a belated look, even if the algorithm's already shoved it to the bottom of your homepage.