Re: How was Liz Sladen's death handled on Sarah Jane Adventures?
Another possibility might've been to have another former companion take over as their mentor. The Martha Jones Adventures, anyone?
Freema's still a regular on Law&Order:UK.
The greatest science fiction series of all time is
Doctor Who! And I'll take you all on, one-by-one
or all in a bunch to back it up!"
--- Harlan Ellison, from his introduction
to the PINNACLE series of Doctor Who books