DOCTOR Foster is back, and from Tuesday’s opener the BBC drama promises to be just as thrilling and enticingly toxic as the first series.

Episode one, watched by 6.4million viewers, caught up with GP Gemma Foster, played by Suranne Jones, two years after her world fell apart – her seemingly perfect marriage to shifty Simon unravelled when she discovered his affair with Kate, the daughter of their close friends.

18 Suranne Jones in the latest edition of Marie Claire Credit: Christopher Fenner/Marie Claire

Time has not dulled Gemma’s fury or her desire for revenge.

But is she as crazed as she appears or just a strong woman giving her love rat ex his comeuppance? Here, a Sun writer and superfan gives her view of the ultimate anti-heroine…

I HAVE a confession to make: I’m in love with Gemma Foster.

While men the length of Britain winced as the spurned ex-wife plotted her syringe-toting revenge, I punched the air in triumph.

Finally, smug shagger Simon will get what’s coming to him.

After a whole series of humiliation and misery, Gemma is going thermo-nuclear. And I loved it.

18 After a whole series of humiliation and misery, Gemma is going thermo-nuclear Credit: BBC

Of course, I don’t really want her to kill Simon and Kate — something that was hinted at late in the first episode. But as a far-fetched revenge fantasy, that final scene will resonate with every woman who has ever been dumped.

With steely, terrifying precision, she laid out syringes and drugs like a woman with a plan.

And just like that, Gemma became the guilty-pleasure poster girl for every spurned wife supposed to just lump it after being thrown on life’s scrapheap by a vain, straying husband.

I howled at the unfairness of Simon’s “perfect” new life — the millionaire’s mansion, the trophy wife, the youth-boosting baby daughter.

He seems to have everything while Gemma is stuck in a rut. And then he added insult to injury, literally.

I felt like I’d been punched as he made jibes about her old blouse and how she hadn’t moved on.

18 The final scene of the first episode of series two will resonate with every woman who has ever been dumped Credit: BBC

The barbs were crushing — like a final, unnecessary kick to the confidence he had already destroyed.

And why was Gemma in Simon’s new house anyway? My theory is that the manipulative sleazebag left that patio door open deliberately, knowing she’d be unable to resist the urge to snoop.

18 Gemma takes snooping on exes to a whole new level Credit: BBC

Just as he knew she would be unable to resist the urge to take a peak at his new home once he’d texted her the address “just to let you know”.

You could see the sick triumph on his face — with not a flicker of surprise — as he busted her from the other side of the glass near the front door.

So I felt not disgust for Gemma, but sympathy.

Every woman is obsessively curious about their replacement, and what woman hasn’t looked up an ex’s new girlfriend on Facebook?

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I know a mate who sat outside her ex-husband’s new marital home crying every night for a week.

Gemma just takes that snooping to a whole new level. And if that makes her crazy, so be it.

Betrayal from a man you once loved is a very real ­— if temporary — route to insanity.

18 Despite her efforts to appear otherwise, Gemma is obviously not over Simon Credit: BBC

At Simon and Kate’s wedding party, the haunted look in actress Suranne Jones’s eyes telegraphed her distress and precarious hold on events, even as she seemed to be keeping herself together.

What a front she put on, though, with her hair artfully pinned to within an inch of its life and a chic revenge dress screaming to the world: “I’m over this.” Hint: she’s not.

She seemed to waver when she bumped into the world’s worst mate Ros, who turned up at the party after having told Gemma she wouldn’t go, yet another betrayal from a woman who has zero respect for the girl code.

18 Ex Simon has everything with his millionaire's mansion and trophy wife, Kate Credit: BBC

Yet Gemma triumphed over all of them as the night wore on. Lube-sniffing aside, she owned that bedroom scene. And as Simon goaded and flirted with her (confession: Actor Bertie Carvel is confusingly hot) I was scared she’d crumble.

But then she spat out that she’d rather “slit her own throat” than sleep with him and it was thrilling.

Suddenly, all of Simon’s sly games and evil provocations were rendered useless. Thank God!

Of course, more misery was to come.

There was that painful moment on the stairs where she realised his new wife Kate is so young she can wear a plunging dress without a bra.

What woman didn’t sigh nostalgically at those perfect boobs (which clearly NEVER breastfed that kid) pointing perkily north and flicking a V to both Gemma and gravity?

Then Gemma and Simon’s messed-up teenage son Tom rounded off a truly crappy week by seemingly ditching his mum for his dad.

It was the final betrayal for a woman teetering on the edge — cue downing a litre of white wine straight from the bottle. Oh Gemma, we’ve all been there, hun.

18 Gemma seems to face no end of betrayals Credit: BBC

Then something incredible happened. Instead of the credits rolling on her Pinot-soaked tears and despair, we saw Doctor Foster take control in a devastating way.

Like some sort of crazed Beyonce video, that final scene was a masterpiece.

Gemma was cold-eyed as her wedding ring dissolved in a jar of acid. As the gold band slowly disappeared, so too did her burden of heartbreak and regret.

And even better, that curtain of hair was FINALLY down again and cascading round her plotting, vengeful face.

L’Oreal. Because he’s worthless.

Suranne Jones talks about the latest series in October's Marie Claire. Read the interview now by clicking HERE

18 October's issue of Marie Claire features an interview with Doctor Foster star Suranne Jones

Show's big question marks

FROM this week’s gripping first episode of Doctor Foster it is clear that the dark drama is going to be explosive. But apart from that, it sparked more questions than answers. So what does series two have in store? EMILY FAIRBAIRN looks at the riddles it set for fans.

IS Gemma mad, or being manipulated?

18 Is Simon trying to make Gemma look mad? Credit: BBC

It seems insane for Gemma to break into ex Simon’s new house then turn up uninvited at his wedding party. But is Simon (Bertie Carvel) just pulling her strings? He sent her his new address and left the door ajar – and is not in the least surprised to see her there.

Perhaps he is trying to make her look mad and enjoying every minute.

WHERE did Simon’s money come from?

18 Kate's dad is minted and Simon is a fraudster Credit: BBC

Two years ago Simon and Kate left town in a Ford Fiesta with very little to their name.

So how can they afford a plush house, designer threads and flash cars?

Kate’s dad Chris is minted, but he tells Gemma he kept his word not to give them a penny.

Simon is a bad businessman and a fraudster. Has he been up to no good?

WHAT’S going on with the neighbours?

18 Neil seems to still have a thing for Gemma

Last time Gemma slept with Neil then told his wife Anna – who already knew and was waging an online hate campaign against the GP.

They made up after Anna helped Gemma when Simon hit her, but it’s strange they are so friendly now.

Neil is still leering at Gemma in front of Anna, hinting at some complicated sexual politics.

WHAT’S in the box?

18 Could the present be a way of getting to Simon? Credit: BBC

It is bizarre that Gemma would give a present to Kate (Jodie Comer), the woman she hates, so presumably there’s something sinister inside.

The box is phone-sized and Gemma told Kate “don’t show Simon”.

Perhaps Gemma plans to blackmail Kate with the help of the phone, using the information she still has on her dad Chris’s dodgy dealings.

WHAT’S up with Tom?

18 Son Tom has mysteriously turned moody Credit: BBC

The teen was having a great time at the party, but then disappears.

Mum Gemma’s search for him is increasingly frantic. Tom (Tom Taylor) later turns up unharmed – physically – but moody and distant.

Up until now, he and Gemma have been close, but the day after the party he goes off to stay with his dad Simon. What triggered this?

WHAT’S the deal with Dr Sian?

18 Perhaps Dr Sian knows some of Gemma's secrets Credit: BBC

The new GP is an irritating goodie-two-shoes who passively-aggressively attacks Gemma while looking as if butter wouldn’t melt.

But she’s more than just a busy-body. Writer Mike Barlett said Sian (Sian Brooke) is important to the plot, adding: “She’s seen as a rival. She seems to know more about Gemma than one might expect.”

WHAT’S Simon’s game?

18 Maybe Simon's new life isn't so perfect Credit: BBC

He says he’s moved on and he should be happy.

Yes, Gemma drove him out of town for two years, but he’s done well for himself in the meantime.

So why can’t he leave her alone? Perhaps his life is nowhere near as perfect as it appears, he blames Gemma and wants to punish her.

What better way to do this than to take their son away from her?

WILL Gemma have sex with Simon?

18 Sex with Simon could ruin his new life

They may hate each other but you could cut the sexual tension between them with a knife.

He asks: “D’you think about me?” revealing he still dreams about her.

Gemma claims she would rather “slit my own throat” than sleep with him, but it would be a brilliant way of wrecking his marriage to her much younger rival Kate.

WHY does James not run for the hills?

18 James' first date with Gemma was a disaster Credit: BBC

It has to be the worst first date ever.

Gemma spends the first ten minutes ignoring hunky teacher James (Prasanna Puwanarajah) while checking her phone, then drags him off to gatecrash her ex’s wedding party and ditches him while she sneaks around upstairs with Simon.

So why on earth does James ask if he can call her again?

WILL Gemma kill Simon?

18 Could the syringes be for Simon's family? Credit: BBC

The opening shot of a paper guillotine hints at violence – the menacing final scene even more so.

After dissolving her wedding ring in acid, Gemma lays out four syringes as the show cuts to Simon, Kate, their baby daughter and Tom enjoying a cosy family dinner.

Does this mean one syringe for each of them? If so, whatever is in Simon’s is likely to be lethal.