Dean pressures Sam into visiting Cicero, Indiana, so he can visit an old flame named Lisa (guest star Cindy Sampson), he had a tryst nine years ago. However, Dean is stunned when he meets not only Lisa again, but also her 8-year old son Ben (guest star Nicholas Elias), who bears a striking resemblance to him. However, Ben soon goes missing and Sam and Dean discover that a Changeling, a demonic parasite, is snatching kids from the small town and assuming their form. Meanwhile, Ruby makes contact with Sam and reveals some startling information about his mom.

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