Block All Stars contestant Mark Bowyer's heart scare puts wind up My Kitchen Rules Suspected heart attack puts a halt on hard work during Channel Nine's The Block. Nine Network THE Block All Stars contestant Mark Bowyer's heart scare put a ratings scare into My Kitchen Rules last night. Nine's renovation show averaged 1.531 million viewers - a season high - and outpointed MKR in Melbourne and Brisbane. My Kitchen Rules averaged 1.791 million viewers nationally in an episode that saw teams competing in an herbs and spices challenge. On last night's edition of The Block All Stars, Bowyer, one half of the Two Fat Tradies team, was struck down with a suspected heart attack. The 55-year-old carpenter was forced to leave the show after the health scare. Bowyer's replacement, reportedly former contestant Dale Vine, will be announced on tomorrow night's show. In Melbourne, The Block All Stars averaged 537,000 viewers. My Kitchen Rules averaged 519,000. In Brisbane, The Block All Stars averaged 345,000 and My Kitchen Rules averaged 336,000. My Kitchen Rules triumphed in Sydney hitting 491,000 viewers to The Block's 417,000. The two shows went head-to-head between 7.30pm and 8pm. The Block All Stars has been building in the ratings ever since it premiered on February 4. Early episodes hovered around 900,000 viewers nationally but that figure has grown to more than a million over the past week. Sunday's show hit 1.44 million viewers and that was trumped by last night's record ratings.