In this story the Daleks' firing noise is entirely different to how it usually sounds (and still does today) with no onscreen reason.
As Jo jumps out of the basket, a Dalek is looking directly at her, but it's apparently sleeping on the job and doesn't react (the real world reason is that it's a goon, a non operational background Dalek, that was mis-posed).
As the Dalek carries his little bit of paper about, you can frequently see the strip of double sided tape that is holding it onto his suction cup.
The 'animals eyes' shining in the night are rather obviously just coloured light bulbs on a board (this is much improved in the 2019 blu ray CGI option).
The first close up of the clock-like wall device shows the main body partly twisting around along with the dial motion (somebody is obviously turning it from the back)
Wester tells Jo that the workers wearing furs are his own people, the Spiridons, whom the Daleks have enslaved. However, the Spiridons have discovered the secret of invisibility. All they need to do to escape is to take their first off so the Daleks can no longer see them. It also makes the idea of how the Daleks captured them in the first place quite nonsensical.