Lead Leviathan Dick Roman acquires Frank’s hard drive that contains sensitive information about the Winchesters and gives it to an unsuspecting brilliant hacker named Charlie (guest star Felicia Day) telling her she has 48 hours to crack the firewall or she is fired. At the same time, Bobby appears to Sam and Dean and explains the Leviathans great plot which he learned before Roman killed him: everything they’re working towards is to turn humanity into the perfect food source for as long as the Leviathans exist.
As Charlie hacks the drive, it automatically sends an email to the brothers letting them know what happened and its location from a GPS tracker on it. Charlie successfully hacks the drive, but learns the truth about the Leviathans and Roman from reading Frank’s files on them and then witnessing her boss get eaten and replaced by a Leviathan. She runs from her job and encounter Sam and Dean who track her down and they team up together to have Charlie infiltrate Dick Roman Enterprises, erase Frank’s drive and hack Dick’s files so they can learn his plans.
She succeeds, learning that what Dick had been recently been looking for in archeological sites has been found and Sam and Dean retrieve it and replace with a Borax bomb. Dick realizes her betrayal and attacks her, but Bobby (who tagged along with her through his flask) and the boys rescue her, but Bobby attacks Dick and displays signs of becoming a vengeful spirit worrying Sam and Dean as there’s no returning from that. Charlie goes into hiding while Roman worries about the Winchesters figuring out the tablet they stole from him.
“The Girl With the Dungeons and Dragons Tattoo” is the twentieth episode of the seventh season of the television series Supernatural, and the series’ 146th episode overall. It was first broadcast April 27, 2012 on The CW Network.
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