Zap2It has Episode 13 premiering Jan 25th (Friday night) at 7 pm. They also have the following description:
The Turtles must battle a new enemy who threatens to take over the city and Splinter's mind.*
Ep 14 premiere is back on Saturday morning - Feb 9th.
Leonardo, tired of Raphael's constant criticism, lets his brother try his hand at leadership for a while; Leonardo meets a beautiful and dangerous female ninja who tries to lure him to the dark side.*
http://tvschedule.zap2it.com/tv/teen...aid=tvschedule
Who knows if this is true.