* '''[[7.14 Plucky Pennywhistle's Magical Menagerie]]''' - While trying to figure out what could be causing the weird deaths in Wichita, Kansas, Dean can be seen looking in John's Journal for clues to no avail.
* '''[[7.18 Party On, Garth]]''' - Looking for what monster has claws and is invisible, Dean looks in the Journal for information, but isn't able to find anything.
* '''[[8.04 Bitten]]''' - While investigating a case Sam and Dean research in John's Journal and discover that Werewolves within four generations of the Alpha Werewolf are "less feral and can transform before, during and after the lunar cycle." They also discover that John noted that Pureblood Werewolves can control themselves and can survive on animal hearts.