Presumably around the late 1700s, the Sphinx was called upon to protect a part of the Philosopher's Stone that Benjamin Banneker was trusted with by George Washington. The Sphinx was stationed inside of Sleepy Hollow.
Around 250 years later in the 21st century, the Sphinx was awakened by the presence of Ichabod Crane and his team. Not long later, Jenny Mills, Jake Wells and Alex Norwood return to the graveyard with the Judas Scepter in hope of finding the talisman. On the building above, Sphinx draws an arrow and fires. Jenny knocks Jake out of the way just in time and they take cover. Jenny gives the Scepter to Alex and the archer shoots it. The Scepter dissolves in a matter of seconds, while the archer fires another arrow at Jenny and she just avoids it. Jenny figures that the Stone piece is in the crypt beneath them, but they can't get to it with the archer shooting at them. She says that they should run in different directions to confuse it. Jake reluctantly agrees and they run. Later, Jenny, Alex and Jake arrive to act as a distraction so that Ichabod and Diana can steal the talisman. The Sphinx comes down and attacks Jenny, and she holds it off long enough for Alex and Jake to hit it. They divide its attention and it hesitates. As Ichabod grabs the talisman, the Sphinx weakens and Jenny takes the oppertunity to shoot it with her crosbow, which causes the Sphinx to dissolve into dust.
|"Columbia"||"In Plain Sight"||"Heads of State"||"The People vs. Ichabod Crane"||"Blood from a Stone"|
|"Homecoming"||"Loco Parentis"||"Sick Burn"||"Child's Play"||"Insatiable"|
|"The Way of the Gun"||"Tomorrow"||"Freedom"|