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I love Supernatural too!!!!!!!!! this is from spoilerfix.com

Episode 2.12: Night Shifter

Airdate: January 25, 2007

01/16 - Sam and Dean investigate a string of robberies with a disturbing pattern in each incident a trusted employee holds up the bank then commits suicide. However, when the autopsy reports shows their actual time of death as several days before the robbery, Sam and Dean realize the shape-shifter has returned. Source: The CW

12/13 - That bank-hostage situation (Episode 12) I told you about last week just got creepier: Turns out the perp is a shape-shifter! Source: Ask Ausiello @ TV Guide

11/22 - Dean is surprised by Sam's lie to Ronald (the 'witness' previously mentioned in spoilers on SpoilerFix.com). Desperate to prove what he saw, Ronald holds up the bank. Dean offers himself as a hostage to get the others, including Sam, out of harm's way. Source: SpoilerFix BuddyTV Spoilers Chat

11/08 - Ronald Reznick, a sort of conspiracy theorist, was a bank security guard who was beaten during a robbery. He believes that a "mandroid" is behind the string of robberies. Source: SpoilerFix BuddyTV Spoilers Chat

11/07 - The brothers are hunted by FBI Special Agent Henriksen, a new recurring character, convinced they're responsible for multiple, heinous murders and determined to capture them at any cost. Meanwhile, a witness believes one crime was committed by a half-man, half-robot. Source: SpoilerFix.com

you can go and read about other upcoming episodes as well....next week's episode looks good!!! I can't wait!!!!