Casting for Season 12 of The Amazing Race Canada is underway, and a familiar voice on the CFRA airwaves might be signing up. We spoil the surprise in Hour 4. Meantime, a gigantic Christmas tree is getting nice and comfy in the ByWard Market. Some say it might be the tallest tree in Canada's Capital. But is it really? CTV's Dylan Dyson provides some measurements. And finally, we preview tonight's CTV Ottawa supper-hour newscast with Kimberley Fowler.