The cast of That '70s Show might've been "all alright" in their on-screen smoke circles most of the time. But behind the scenes, there was a lingering haze of drama, some of which came to light in 2017 with disturbing allegations about star Danny Masterson during his time on the show. That got us wondering what else the cast might be sweeping under the rug. Of course, not all secrets are created equal. From the serious to the silly, here's a look at some of the other dark secrets the cast of That 70s Show tried to hide.