|Dates||November 2017 (rendered brain dead by Castiel)|
|Location|| Lewis, Oklahoma (residence)|
|Episode(s)|| 11.21 All in the Family|
11.22 We Happy Few
13.02 The Rising Son
13.13 Devil's Bargain
13.14 Good Intentions
I can't be a prophet. I'm an atheist and a chemist! I-I believe in molecules, not God.
– Donatello Redfield, 11.21 All in the Family
Donatello Redfield was a chemistry professor at an unnamed university in Lewis, Oklahoma. He was the only survivor of a rabid attack Amara sent to the town. As the fog approached him Donatello was struck by lightning, becoming a prophet, having been triggered due to coming into contact with Amara's power. Amara later consumes his soul in order to track down Chuck.
A couple of years later, Donatello returns to find the Winchesters, drawn to them by Jack's power. After Jack is stuck in Apocalypse World after a failed attempt to rescue Mary, Castiel and the Winchesters call upon Donatello to read the demon tablet in an effort to find another way to open a portal. Donatello translates a spell, but unbeknownst to them becomes influenced by the tablet and misleads them, trying to get them killed. Not having a soul has left him vulnerable to the dark energy of the tablet, causing him to go mad. Frustrated, Castiel decides to use his power to extract the portal spell from his mind, leaving Donatello brain-dead and on life support.
After learning about Amara's attack on Lewis, Oklahoma, Sam and Dean arrive to question Donatello, who was the only survivor. Donatello describes to Sam and Dean how the fog came from nowhere and caused people to begin choking and appear with black tendrils all over their bodies. He tells the Winchesters that when the fog approached him, he was suddenly struck by lightning, and his mind began exploding with "knowledge and clarity" and visions of destruction and death. Believing Donatello has become a prophet, Sam tests him out by showing him Enochian. Donatello initially tells Sam he has no idea what the paper says before surprising himself by reading "Behold the face of God."
Driving in the Impala, Donatello finds it hard to believe he is a prophet, explaining that he is an atheist and believes in science, not God. After Sam and Dean explain everything involving God, Amara, and Lucifer, Donatello freaks out and futilely attempts to escape the Impala. As Sam and Dean try and calm him, Donatello begins sensing something, believing it could be God. At the Bunker, Donatello meets Chuck, who apologizes for the death of his cat and welcomes him aboard the team and tells him not to worry about his past atheism.
Sam, Dean, and Donatello soon meet with Metatron at the Bunker. There they formulate a plan to rescue Lucifer from Amara. A skeptical Metatron asks if they even know where to find Amara, prompting Donatello to reveal he is getting a "vibe" and may be able to locate her. With Dean being used as a distraction for Amara, Sam, Donatello, and Metatron arrive at the silo where she has been torturing Lucifer. As Metatron frees Lucifer from Amara's binding magic, Donatello senses that she is returning. Sam, Lucifer, and Donatello begin to leave, while Metatron tries to buy them time. As they are speeding off, Amara appears before them in the middle of the road. As she is about to destroy them, the Impala is teleported to the Bunker by God.
Sam and Dean then see Donatello off. He tells the Winchesters that he is going to see what comes next, as he doesn't feel like going back to academia and he can't go back to being an atheist anymore. He thanks Sam and Dean for their help, and they tell him they may need him again down the road before he drives off in his taxi.
Three days after becoming a prophet, Donatello is back at his home in Lewis, Oklahoma, where he is being assaulted by Amara. He pleads with Amara, telling her he doesn't know anything. Amara tells him that he knows where God is, and Donatello defiantly tells her he won't tell her where Chuck is. She tells him he won't have to before clasping her hands on his face and consuming Donatello's soul, which allows her learn that her brother is in Kansas.
Arriving at Sam and Dean's motel, Donatello is immediately assaulted by the Winchesters, who are surprised to see him. Asking them if God is "here," Donatello tells Sam and Dean that he had his soul taken by Amara, but he has figured out a way to keep his moral compass, by imagining what Mr. Rogers would do whenever he comes to a moral crossroads. He goes on to further explain the reason he is in their motel room, telling the Winchesters of his plans to retire to Boca after his experiences with Chuck and Amara, when he was knocked off his feet by a wave of power, something that was unlike God's and which drew him to their location in Wyoming, and to Jack.
Upon meeting Jack, Donatello learns he is a Nephilim and the son of Lucifer. He tells Jack he has met his father, and that the energy coming off of him is nothing like the dark and toxic energy of Lucifer. Realizing if Donatello can locate Jack, angels and demons may be able to as well, prompts them to take Jack to get wardings tattooed on his body.
After Jack has an episode getting his tattoos, Sam and Dean argue about his nature. Donatello chimes in, telling Sam and Dean of nature vs. nurture, and that as a scientist he doesn't see teaching Jack as a possibility, reminding them that a lion can't not be a lion and that Jack is a human with a dose of God juice.
The next morning Donatello returns to his room with breakfast burritos, only to find Sam and Dean waiting, and realizing that Jack was taken by someone that looked like Donatello. He suddenly gets a ping on Jack's location and the three get into the Impala and end up driving towards Jasper, Wyoming, where Jack has been tricked by Asmodeus, in the guise of Donatello, into opening a Hell Gate in an attempt to free the shedim. When the Winchesters and Donatello arrive, Donatello gets into a brief shouting match with his doppelgänger, prompting Dean to take a shot at Asmodeus, breaking his illusion. Asmodeus begins choking the three with a gesture of his hand, but when Jack sees Asmodeus is hurting his friends he seals up the gate and turns his attention to Asmodeus who teleports away, releasing Donatello and the Winchesters.
After learning from Castiel that the Michael of Apocalypse World opened a portal to their Earth through a spell from the angel tablet, Sam retrieves Donatello in the hopes he can find and translate a spell from the demon tablet to do the same. A bewildered Donatello arrives at the Bunker, and upon seeing the demon tablet for the first time claims the glyphs are "nearly impenetrable." When Sam asks if they can get him anything, Donatello tells him he needs chicken wings, explaining it is "brain food" for him that has helped him with heavy thinking in the past.
Taking a break from translating the tablet, Donatello makes a fried chicken run and is startled by the appearance of Castiel (in reality Asmodeus). Donatello reveals he has determined that there is some kind of spell on the tablet that could open a rift and says he couldn't live with himself if he couldn't help get Jack or Mary Winchester out of the alternate universe. Asmodeus, having heard enough, shifts back to his original form and hypnotizes Donatello into forgetting their meeting and orders him to report any information to him. Donatello, in a daze, agrees and walks away.
At the Bunker, Sam, Dean, and Castiel sit around discussing plans as Donatello continues his translation. When Sam notes Donatello looks to have made some progress, Donatello snaps at him before calmly telling Sam he is working his way through the ingredients.
While Donatello attempts to decipher the ingredients, he is corrupted by both Asmodeus's influence and the dark energies contained within the demon tablet. He misleads Sam, Dean, and Castiel by giving them a list of the wrong ingredients. While Dean and Castiel are sent on a wild goose chase to kill Gog and Magog, Sam assembles the available ingredients from the Bunker's storage area. Donatello grabs a bottle and attempts to bash in Sam's head, but Sam gets the upper hand and imprisons Donatello in the Bunker's dungeon.
When Castiel and Dean return, Sam shows them a video feed broadcasting from the dungeon, showing Donatello having hallucinations and mumbling to himself. When Sam and Dean try to talk sense into him, Donatello refuses to cooperate and casts a spell on Dean to try to suffocate him and he laughs manically while Sam tries to get Dean away from him. They realize that since Donatello's soul was consumed by Amara, the demon tablet's dark energy had not been filtered out, causing him to turn on the Winchesters. Castiel believes that since they can't get his soul back, they should kill him and allow another prophet to be activated, but Sam and Dean are adamant on account of needing him to get the spell. Castiel locks himself in the dungeon where a smug Donatello continues to be disobliging, but Castiel decides to strip the spell from Donatello's mind even though it is a risky procedure. Donatello tries to cast a spell, but Castiel keeps him quiet while he extracts the spell. The event leaves Donatello brain-dead, only being kept alive by machines. Castiel reveals to Sam and Dean that when he was extracting the spell from Donatello's mind, he discovered how he had been influenced by Asmodeus into working for him.