While filming the fifth-season episode "Daddy Does His Thing", York fell ill: "I was too sick to go on. I had a temperature of 105, full of strong antibiotics, for almost 10 days. I went to work that day, but I was sick. I lay in my dressing room after being in make-up, waiting to be called on the set. They knew I was feeling pretty rotten, and they tried to give me time to rest. I kept having chills. This was the middle of the summer and I was wearing a sheepskin jacket and I was chilling. I was shaking all over. Then, while sitting on a scaffolding with Maurice Evans, being lit for a special-effects scene: They were setting an inky – that's a little tiny spot that was supposed to be just flickering over my eyes. That flickering, flickering, flickering made me feel weird. And I'm sitting on this platform up in the air...and I turned to Gibby, who was just down below, and I said, 'Gibby, I think I have to get down.' He started to help me down and that's the last thing I remember until I woke up on the floor. That's about all I remember of the incident...and I'd managed to bite a very large hole in the side of my tongue before they could pry my teeth apart."