It is annoying but the entire show is littered with spoilers with the constant "Tonight..." preview at the start of each episode and "coming up" at every ad break. It'd serve them right if everyone switched off after the 30 second edit at the start of each episode.
I did think for a time they were trying to come up with new and inventive warnings for every episode just to entertain the viewers, some of them have been quite funny.
I'm waiting for
"As time ticks by, be prepared for stong language, racism, premature ejaculation, bullying, and jam roly poly puddings"