I believe it is too late Graham. After the Xandorian brain slurper had turned his brain to a consistency resembling a freezie, Alexander couldn't resist and sucked it out with a straw. Unfortunately, Alexander didn't realise Alston was suffering from CJD, which explains why he is even more 'things that batt(i)er' than usual.
Deary me. Does anyone know the location of the jar containing Alston's brain, so we can stick it back inside his skull?