And from wetpaint.com:
"Warning: Spoilers ahead!
As far as we can tell, Dawn (Natasha Henstridge) is just your typical bombshell high school principal, but rumor has it that behind that pretty smile lies a villain even more deranged than Charles Meade (Gale Harold)!"
Read the rest (possible spoilers) here:
Secert Circle Spoiler: Dawn’s Past Comes Back to Haunt Her