The Block is not airing tonight because, according to the usual schedule, The Block airs Sundays at 7pm and continues Monday to Wednesday at 7:30pm and Sunday at 7:00pm on Channel 9 and 9Now. It appears that tonight just may not align with the scheduled airing days/times for new episodes. There is no clear special reason for a block on The Block tonight other than the regular broadcast schedule pattern. If you are referring to a cancellation or delay of the episode airing, there seem to be no recent announcements or reasons given for a block on tonight, unlike past cancellations related to public events or COVID adjustments. The normal episodes are airing as planned on designated days of the week in October 2025 on Channel 9 and 9Now.