When the Doctor understood that Nick went off to a mansion and he got the password and all that, they should've made what was going inside more elaborate.

Showed more inside the secret society. Perhaps some child rape or little something from "SALO." You know something extremely disturbing that they are ashamed of or hiding from.

But i guess its set up to use our imagination.

And what about that last part where Alice suggests they have to fukk.

Yeah, all this was somewhat of a let down.