Emmerdale spoilers: Cancer diagnosis, wedding 'nightmare' and killer 'exposed'

There's some big moments ahead on including a wedding, a killer discovery and a sad cancer diagnosis.

One killer's nightmare faces coming true, as a special set of episodes, with a change to the usual format, sees him face his nightmares. Elsewhere another killer could also be exposed as a newcomer demands answers.

It's teased one character goes missing after another discovery, while fans can also expect two men at war and some surprises. We'll start with the big wedding, as killer John Sugden risks being exposed.

He's left in a panic when he realises that the week of his wedding to Aaron Dingle could go very wrong, as the lake is being dredged and his ex Aidan Moore has woken from his coma. It seems there's more to be told about what led to Aidan being in a coma for years, with it believed he would never regain consciousness.

But next week it's confirmed that he's awake, and soon John is fearful Aidan will expose his lies and the truth about their past. Then there's the fact the lake is being dredged due to the slurry leak, caused by John.

He framed Mackenzie Boyd for this but his actions could be about to haunt him. Viewers know John killed Nate Robinson last September and no one in the village knows.

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That could be about to change though, as with the lake needing clearing and Nate's body being in said lake surely it's only a matter of time before the murder is finally exposed. With that and Aidan and Aaron having jitters, will the big day go ahead? Will they even make it to the vows?

Viewers will be treated to multiple outcomes before seeing what actually happens, with each episode next week forming the same day. We will see John's fears come to life before finding out whether or not the pair get married.

John even tries to do a runner at one point, caught out by Aaron. Aaron also follows him to the hospital after seeing him head there with Cathleen in his wedding suit - with one moment seeing the wedding called off.

John pleads his case, while one character, Mack, appears to be missing. The ceremony begins, but will it go ahead without any further drama?

Speaking of Mack, he finds himself caught up in Ross Barton's drama with new brother Lewis. After the pair try to steal Lewis' cannabis plants from his secret farm in the attic of his home, Lewis catches them out thanks to a camera app and wants answers.

Ross gets Lewis' keys and manages to convince Mack to help him, with them soon finding the farm in the attic. But when Lewis gets an alert on his phone that suggests an intruder is in the attic he prepares to confront him.

He realises it's Mack and calls out Ross, wanting an explanation from both of them. But Lewis agrees to let Mack go on one condition, he wants to know the truth about his his mother died.

It seems Ross could finally tell him how Moira Dingle was the true killer, as she's been fearing would happen. But if Ross does expose her, how will she react and will Lewis let her get away with it?

Elsewhere next week there's worrying scenes as Sarah Sugden is diagnosed with the early stages of cervical cancer. As she heads to the hospital for her biopsy results alone after recent tests, she's left struggling to take in the diagnosis.

She's undeterred over her plans to have a baby through IVF though and learns this still could be possible. Sarah bumps into ex Jacob Gallagher and she tries to put on a brave face, only to break down and confess her diagnosis.

He comforts her but when he realises Sarah found out due to her IVF plans, he's pretty blunt and shares his clear disapproval of her having a child given her life-limiting health condition, fanconi anaemia. He explains the impact of losing a mum especially when you are younger, before calling her selfish - but how will Sarah react?

Finally next week, and things continue to boil over for enemies Billy Fletcher and Joe Tate. As Billy continues to accuse ex Dawn Taylor of having feelings for Joe after their affair, she has enough with the constant battles - leading to a plan from Joe.

Emmerdale airs weeknights at 7:30pm on ITV1 and ITVX, with an hour-long episode on Thursdays. * Follow Mirror Celebs and TV on , , , , , and .