These “Late Show with Stephen Colbert” Must Mean Colbert’s Late Show Debut Is Close August 3, 2015 Uncategorized late show, promos, stephen colbert We only have just over a month before 11:35PM on Sept. 8th, the night when Stephen Colbert kicks off his Late Show run, which might be one of the most highly anticipated premieres this year. These promos make it seem like that month and change… …isn’t that far away.