Di makes a sound of frustration when he declares he'd overloaded - she's not surprised, but at the same time she'd really thought they might be getting somewhere.

And then her glance flickers down at her communicator and she gasps.

psii
oh psii
no, love, it's not your fault
you did everything you could
i know you did
i'm the one who's sorry
i wish i could have saved you
could have stopped them from doing this
i'm so very sorry
i miss you
i don't know what to do to help any more
but i won't stop trying
i promise