Homo Aqua
An interesting slow start, could be a prologue to the kind of thing the Doctor deals with in a two-parter.
(Also Barclay notes meeting the Doctor, for a few seconds, and being amazed.)
Plastic Apocalypse
Good speech. Kate should know people can rise to the occasion without the Doctor there to help.
But also a twisting of words. The Sea side (sorry) is naturally sympathetic here but they aren’t playing fair.
(Also Kate reflects how nice it would be to have the Doctor here.)