Silas is Jacob, from LOST, doing a crossover. Hey, it could happen, right?
Silas is a retired Jack Bauer. Where Chloe at? Silas needs her to open a socket to the future.
Silas is Palpatine, who fell down that chute in ROTJ (which was actually a portal) and was transported here. Oddly, he too has suffered memory issues and has yet to remember anything about The Force or his plan to rule the galaxy. Pray for his continued ignorance.
NMSSIS (Never Mind, Stupid Show Is Stupid).