My part of the cake:
Since we had to deliver a new episode each week, we had to be smart and agile with how we solved each shot. Thus I served as a Jack of all trades, and I made my best to supply the compositors with everything they required in order to make something cool.
This included modelling, look development (in Vray for Nuke), tracking, scene setup, compositing and some general 3D.
It was a great fun to work on this epic TV-show.