It felt like a tribute to the Star Wars cantina scenes, the aliens all had that stylised look to them.
Yeah, I gotta agree with that and most of the costuming etc wasn't half bad. Liked the "bucket of stars" sparkly faced aliens as well as the one with strange looking re-breather/hooker/filters attached to its face. Talk about taking CO2 capture (and avoidance of the CO2 tax) to ridiculous degrees !
I merely found it annoying that near all the aliens were two arms, two legs, head/eyes on top of body, and of average human height and build.
That strains the land of suspension of disbelief for me, especially when I'm used to reading about / imagining / seeing far more variety of species and kinds, etc, down Alice's rabbit hole with no tardis required.
Anyhoo, I also noticed that they slipped in yet another Star Wars sound effect or two (if memory serves me correctly, it happened at least a couple of times last season).
This time it was towards the end when the Dr is fiddling around in the Tardis and talking back out towards the door. An annoyed R2D2 fart type sound seemed to have been used.
... or maybe that was just me.
Episode is up on iView so, if I get the time later, I'll scan through and located the minute:second my studio ears reckon they heard it.
regarDS