Of sorts .....
Young Scooty pulled an all nighter last night getting a scoop on the Doctor Who series 4 finale .. and who should he espy around but Lis Sladen!
I shall give him a nudge to give us the full low down, but in the meantime he has posted lots of juicy info over at OG, sort of around this page here
You might have to sift through ..... lots of people posting excitedly!
UPDATE! SFX Magazine issue 168 confirms that Sladen's role is much more than just a blink-or-you'll-miss-it cameo. It's a proper (dramatic!) guest appearence, that draws together four series of Doctor Who mythology.
Oh, and Sarah-Jane meets Captain Jack Harkness on screen, too...
Should be interesting!