Home and Away reveals the shocking truth about John Palmer later this month as Kat Chapman realises that he's the serial arsonist who's been terrorising Summer Bay.
Kat (Pia Miller) uncovers John's dark secret following the discovery of a crucial clue – a silver lighter which is connected to the recent spate of fires in the Bay.
When a fingerprint test is carried out on the lighter as part of the investigation, Kat makes a major breakthrough as it comes back with a match to John (Shane Withington).
Unfortunately, before Kat even gets a chance to question John about his antics, his health takes a drastic turn for the worse as he collapses in his own home and suffers a frightening seizure.
Kat Chapman and Marilyn Chambers watch on as John Palmer gets rushed to hospital in Home and Away
© CHANNEL 5
John's wife Marilyn (Emily Symons) is horrified by the situation as he's rushed off to hospital, but there's an even bigger shock to come when she discovers that her unwell husband has become the prime suspect in Kat's investigation.
When John gets the help he needs at the hospital, it's left to Nate Cooper to break the bad news that his seizure was caused by a brain tumour.
Word then quickly gets back to Kat, who's told that brain tumours can cause blackouts and significant behavioural changes. Does this explain why John has turned to the dark side?
Marilyn Chambers watches on as John Palmer gets rushed to hospital in Home and Away
© CHANNEL 5
John Palmer is rushed to hospital in Home and Away
© CHANNEL 5
Marilyn Chambers worries about John Palmer in Home and Away
© CHANNEL 5
Home and Away airs these scenes on Tuesday, April 11 at 1.15pm and 6pm on Channel 5.
Digital Spy