When kc talks to her parents she has her hands behind her but in the next scene she has them in front.
It would take more than a night for Brett with KC to drive over to New York from Washington (New York's on the Other Side of the Country from Washington).
Why would Brett intend on giving KC tickets to a Midnight Concert in order to bring her to Zane? Surely he'd know that KC's Parents wouldn't allow her to go then.
It's Surprising that Craig and Kira knew nothing about Zane having a Son, that was born before KC had been.
Kira said she tried to call KC when she didn't return, yet KC never heard her phone ring when tied up in Zane's Barn Hideout.