Claudia must face Paracelsus in the Warehouse - alone.
Myka gets back from the hospital to discover Artie and Jinks trying to get back into the Warehouse and schools them for not knowing the way to break Paracelsus's lock-out spell. And then she's like, "And I just got out of surgery!"
Once inside, they discover that Claudia's movements are being controlled by Paracelsus!
Artie and Myka relight the lights in the El-dunari, thus freeing Claudia. Now how to solve the Paracelsus problem?
Paracelsus creates a wormhole and goes back in time to… do something… that transforms the entire Warehouse, and perhaps the world!
Artie hands out forks that will keep them safe, even if the timeline shifts.
Claudia and Pete discover that Benedict Valda, who sacrificed himself for them in another timeline, is controlling Paracelsus's army in this timeline!
And Artie discovers that Paracelsus is using artifacts to experiment on human subjects.
Pete and Myka rig another wormhole and go back in time to Italy in 1541 when Paracelsus killed all of the Regents.
Even though Claudia is still miffed at Artie for lying to her about her sister's death, she tries to save him after he sacrifices himself for the team. Sadly, she gets captured, too.
Back in the past, Pete catches up with the evil genius and puts him down, once and for all.
Myka overhears Pete say that Paracelsus tricked him by saying he could save Myka. She's touched, but also punches him for being so stupid.