She had filmed six out of 12 episodes from the next series of Sarah Jane. I would still air them in a special dedication to her week around Christmas and finally film a special 1 hour episode which is the death of Sarah Jane because it would be a shame to not have her character killed off if the actress has.
How do you know how many have been filmed? have they definitely got all the filming they need to be able to complete these episodes?
I'd rather not see Sarah Jane killed off. Let her continue to defend the Earth, even if we don't get to see her at it any more.