Donna’s Mom Disappeared From The Show Because Tanya Roberts’ Husband Was Dying
Midge (Tanya Roberts) left husband Bob and daughter Donna high and dry in the fourth season of the show. It was a shock to everybody and managed to produce some real pathos. Unfortunately, Roberts’s departure was necessary because her husband had terminal cancer in real life. She wanted to spend as much time with him as possible. It’s too bad That ’70s Show producers couldn’t give Midge a more heroic departure.