Stephen Colbert's late-night show has been cancelled, with Byron Allen reportedly set to replace him in a CBS late-night shake-up. The circumstances surrounding the cancellation are unclear, with some outlets suggesting it may be related to Colbert's push into politics. The change is part of a larger shift in the media landscape, with other notable shows and personalities also experiencing changes, such as Savannah Guthrie returning to the 'Today' anchor desk.