Have been watching since season 1. Fantastic underrated show, season 3 is mind-blowing so far.
Season 1 and most of season 2 is episodic, the story arc kind of only got moving towards the end of season 2.
The story arc is insanely brilliant and yes, questions do actually get answered.
Their episodic adventures are pretty enjoyable too (with the exception of the musical episode
In all a must-watch if you're a sci-fi fan/serialised TV fan.
Too bad most of the tv viewers these days only watch sitcoms and procedural dramas.