Origin story for Sigma was disappointing

and it made Tae Sul looked stupid. He used his genius skills of deduction to narrow the list of people to a certain group of people but then had to rifle through a stack of papers to identify him. Surprise, it was psycho, creepy kid, who set fires, drew scary pictures and said he would be the first to use a time machine I would build. Who would have guessed it.

Sigma backstory revealed

Many questions are answered. Other questions remain?!All our theories are wrong!! How quickly can we get to Epi 13/12