One source said: “Ken suffers a suspected heart attack so there is potentially no connection with the drugs but he does collapse after all the stress of whether or not Cassie has been up to no good.
Viewers know that vulnerable pensioner Ken, played by William Roache, is being drugged by his carer Cassie Plummer, played by Claire Sweeney.
This is the shocking moment when Coronation Street veteran Ken Barlow suffers a suspected heart attack during an episode to air next week.
But there is hope on the horizon for Ken because when Cassie heads out to have lunch with Steve McDonald (Simon Gregson) at the Bistro, his eyes ping wide open - suggesting he might have rumbled what she is up to.
Cassie started slipping antihistamines into Ken’s tea many months ago, in a bid to ensure that her employment as his carer continued.
