In the recnet Ep of the Flash: Shades  we got a 1st look at Saivtar  the God of motion  in the Killerfrost Ep that is coming up this week Greg Grunberg as been cast as a Series Regular. Greg Grunberg Chacter Name is  Tom Patterson so my Theroy States That Tom Patterson is the Evil Speedster Saivtar if you Take a look at Greg GrunBerg he's the Same Hight Same Built as Saivtar Greg will apprea in the New Ep Killerfrost After the Ep Shade Where Saivtar Appered so Guy Tom Patterson is Saivtar.