|Episode(s)||7.06 Slash Fiction|
Dead plants with creamy goo. It's like eating self-righteousness. I mean, you tell me which is worse.
– Leviathan!Sam, 7.06 Slash Fiction
Leviathan!Sam, along with Leviathan!Dean, commits several murders in Jericho, California; Black Water Ridge, Colorado; Lake Manitoc, Wisconsin; St. Louis, Missouri; and Ankeny, Iowa; all places where the real Winchester brothers already worked cases (during the time of season 1). Their plan is to frame Dean and Sam so that, once they are arrested, they will be easy to locate and kill. He travels with Leviathan!Dean in a '67 Impala almost identical to the one that Dean drives, except for its custom rims and Illinois license plate.
He dislikes having to impersonate the younger Winchester, complaining about Sam's mental issues (resulting from his time in Hell with Lucifer) and about the food he eats, saying it's like eating "self-righteousness." He even tries to trade disguises with the other Leviathan, but to no avail.
Dean later confronts and decapitates him with the help of Sheriff Osborne in Ankeny, Iowa. Dean and Sam then take his and Leviathan!Sam's heads to dispose of separate of their bodies, which they leave with the sheriff. Their bodies are eventually recovered by the [Leviathan posing as Agent Valente.