Home and Away spoilers: Leah knife horror, Alf threatened and Mackenzie collapses again
![Home and Away spoilers: Leah knife horror, Alf threatened and Mackenzie collapses again](https://i2-prod.dailystar.co.uk/incoming/article32084422.ece/ALTERNATES/s615/1_Home-and-Away-spoilers-Leah-knife-horror-Alf-threatened-and-Mackenzie-collapses-again.jpg)
Leah's paranoia gets the better of her as she threatens Justin with a knife. Meanwhile Alf insists John is reinstated at the surf club as Mackenzie suffers another heart attack