I thought it was a bit of a mess.
(caveat: bear in mind I always hated the Lesbian Detective Lizard strand - so was on a bit of a hiding to nothing)
The whole flash-back sequence was overly stylised - when they got out of the Tardis why was it like a hand-coloured silent movie? Where's the sense in that - and the freeze-frame photos? Enough with the music video sensibilities, already.
The fainting - plain daft and yet another in a catalogue of devices seemingly designed to take you out of the story.
The Tom-Tom joke was unforgivable for exactly the same reason.
Sonic-screwdiriver erection joke????
And what exactly did the red stuff do? Did it kill you, turn you red, make you immune, turn you into a wax-work....?
And why was there a special machine to make you not red/dead/whatever?
And who built the rocket - was it the Wiggly Worm , or did he have help from Diana Rigg?
An in the end it turned into the Sarah Jane Adventures.
I really really love Neil Gaiman's work.
I'm hoping next week will improve.