[Cal.]

Originally Posted by Firewire

They were probably contracted to finish filming otherwise they'd be sued

I just can't see how they wouldn't have had leeway to get their exit changed when they first approached with it in (I'm guessing) spring time 2016? (At that time no scripts would have been written etc). They could have surely said 'We don't want to die' and had their way as the iconic and long serving cast members they are? I've heard stories of actors refusing stories before.