*WARNING THIS ARTICLE CONTAINS SPOILERS
Channel 5 viewers were sent spiralling at around 10pm on Wednesday night as The Teacher dropped a bombshell at the end of its third episode when the arrival of a new character changed everything.
After weeks of teaser adverts, the hotly anticipated thriller starring Sheridan Smith kicked off on Monday night and became a major talking point on social media from the second that its opening titles rolled.
Sheridan leads The Teacher cast as Jenna Garvey, a teacher, who while devoted to her job, is also a big believer of work harder, party harder.
Unfortunately it's that approach to life that threatened to rob her of her career, which had just seen her received a lucrative promotion, when she blacked out after a work night out and was accused of having sex with a pupil in a nightclub toilet.
READ MORE: Kelvin Fletcher exposes where The Teacher was really filmed
Unable to piece together what happens, Jenna pleaded guilty to engaging in sexual activity with a minor; lost her job and was placed on the Sex Offenders register.
Gripped by what was playing out on screen, viewers watching at home were soon concocting their own theories on what actually went on as it became more and more apparent that Jenna was being set up.
Everyone from bitter colleague Nina to her so-called closest ally at work Jack, played by Kelvin Fletcher, were put in the frame by fans as Jenna tried desperately to work out who was behind the plot to ruin her career, as she kept receiving lewd pictures and videos and even a used condom in the post.
At the same time Kyle, the pupil at the centre of the scandal, received messages on his phone about what had been going on, urging him to stay strong.
The Teacher concludes on Thursday night but any viewers who thought they had their ducks in a row when it came to who was trying to destroy Jenna had any theories blown out the water when, after Jenna spotted him in a picture she'd been sent, colleague Pauline's husband entered the equation,. with it looking that he is the man behind everything.
And many viewers now believe that Pauline, who seemed to be one pf Jenna's biggest cheerleaders, could also be in on it.
One tweeted: "OMG how good is The Teacher? This has to be the best drama @channel5_tv has ever produced. Mostly down to
@Sheridansmith1 and a belting cast."
Another reacted: "Pauline is in on this. And who is texting Kyle?" and another posted: "I think the boy is having an relationship with the male teacher, and the male teacher is using jemma as bait to lure people away from suspecting them."
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