Derryn Hinch tweeted late on Wednesday that Vizard was in the 3AW offices, for reasons unknown. ”The plot thickens. Steve Vizard in building today having publicity shots taken for 3AW celebrity wall. Replacing whom?” Though station management has made no official statement, sources have confirmed that Vizard is set to join 3AW as a regular fill-in host, working about 16 weeks a year across the schedule as regular hosts take leave, reports Karl Quinn.