This show is brilliant (warning: sort-of spoiler in first sentence (!)), and it seems to have flown entirely below everyone's radar. Tatiana Maslany plays a streetwise career criminal, Sarah Manning, who steps off a train in a nameless American city to watch dumbounded as a crying woman who looks exactly like her throws herself under a train. She steals the woman's purse and the plot unfolds from there.
 
It's a sci-fi thriller with some snappy one liners -- closer to Buffy in tone than anything else, really. Outstanding acting from the lead who turns in an Alias-like performance playing different characters and accents; she's impressively chameleon like, with only subtle body language clues enough to clearly let you know which character she's playing.
 
Some great supporting actors too; her metrosexual gay foster brother Jordan Gavaris steals most of the best lines, and there's a recurring role from Michael Mando (Vaas from Far Cry 3!) as Maslany's abusive boyfriend. And I hope for great things in the future from Kevin Hanchard, a down-at-the-mouth homicide detective with a mysterious relationship to Maslany's character.
 
The show doesn't initially spell out its premise, so if you're spoiler-adverse, don't read this: but without saying this bit, I can't talk about the show at all. You'll probably suspect this by the end of the first episode and it's outright confirmed by the third anyway, so it's no big secret.
 

 
The plot twists and turns at a decent clip and is put together like a precision engineered watch; you're not going to see all of the crosses-and-doubles-crosses coming, for sure. And yet for me it never put a foot wrong with characterisation; you're never left thinking that someone did something that was inconsistent with what you know about them for the sake of advancing the plot -- which is refreshing for a glossy TV show these days. Lots of stuff that doesn't seem remarkable in early episodes takes on new significance in light of developments later on, and some moments that seemed out of place turn out to be perfectly explained by something you just didn't know yet.
 
The first episode is a wee bit generic and a little bit underwhelming (in particular, you may find Maslany's Londaaaahn accent distracting) but stick with it because it all starts to take off from the second episode onwards. Once it gathers momentum, it doesn't let up until the end -- be prepared to binge-watch if it gets under your skin.
 
It's ten episodes long and already confirmed for a second season. It's my favourite new show of the last year, I think.

ooOOOOoooh.

Thanks I shall try and watch this. Sounds up my boat, despite bailing from potential spoilers about three lines in!

Sick'd!

No spoilers read!

I should point out it's a pretty mild spoiler in the block, but still, if the rest of the text was enough to sell you, then don't read it; go in blind.

I watched the first few episodes after the star was a guest on the nerdist tv show and it seems interesting just not sure if they can keep things going for a full season

I did think it was a bbc America show ( might just be that it's shown on bbc America )

It's a Canadian show that aired on BBC America.

And yes, the season goes from strength to strength.

Edit -- apparently BBC America was a co-producing company, so I stand corrected. I wonder if that means it'll show up on BBC here at some point.

Episode one was ok, I shall continue.

Cheers. Ill have a look for it.

There's some weird ass accents in here.

Have you not met Meaty Angel?

Wait, she's supposed to be from Brixton? I thought she was Australian!

'lright Guvnaaaah! Putta nova Shrimp on the Barby - Eh!?

(Enjoying it a lot otherwise)

Is she related to Dick Van Dyke, by any chance?

Her acting when she's talking to Art in the last episode is superb.

I think she's an outstanding actress. Definitely one to watch. Also

Season 2 airs in April, whoo!

Sunday, Sunday, Sunday!

We'll rent you the whole seat, but you'll only need the edge!

I AM EXCITE.

Who's your favourite? It's Allison, right? Of course it's Allison.

Cosima, duh.

I watched the first series of this, it is good. Thought the last episode was a bit naff, but only in comparison.

It's over! Finale was great for me. It wasn't a perfect show; it meandered in places and suffered from a touch of making-it-up-as-we-went-along incoherency. But it was always anchored by Tatiana Maslany's fantastic acting coupled with great writing, wardrobe, and FX work for the multi-character scenes. At least once an episode I'd have to work hard to remind myself I was watching one person, not two or three or four. I loved it and I'm sad it's over.

Yes I'd agree with that. The last series sort of fell towards the conclusion rather than strode towards it confidently but it still felt like the journey was complete at the end.

Tatiana Maslany amazed me throughout but even moreso in those scenes where she's one clone pretending to be another clone. Alison as Sarah being my favourite.

Those were sorcery, because you could always tell really quickly which clone she was acting as and which clone she was pretending to be, even when the show didn't tell you. Something in the body language, I think. Also the wardrobe work was spot on -- they'd always give her a wig that was about 70% as good as the wig she'd wear when actually playing the second clone. There were always little details like that that were off, just to clue you in.

The subtle nature of the clues really worked because you could buy into people falling for it - such a fine line, sorcery like you say.

I would get distracted watching those scenes occasionally, becoming obsessed with how the hell Tatiana Maslany got into the mindset of one the characters trying to get into the mindset of one of the other characters but retaining just that slight hint of the original's personality so that the viewer can put that together with all those other clues to suss out what's happening.

Whoever invented Helena-noise needs an award too. As does Donnie. And the guy who played the male clones while we're at it.

Really just an awesome body of work.

Oh god, yes, I loved that. Such an iconic piece of... music?