|Dr. Alan Nealon|
|Birthdate:||24th June, 1962|
|Manner of Death:||Shot by Delphine after he tried to implant a worm into her mouth|
|Residence:||Toronto, Ontario, Canada|
|Occupation:||Doctor, Chief Geneticist|
|Affiliation:|| Dyad Institute|
|Portrayed by:||Tom McCamus|
|First appearance:||"By Means Which Have Never Yet Been Tried"|
|Latest appearance:||"History Yet to Be Written"|
Dr. Nealon debuts in the season 2 finale, "By Means Which Have Never Yet Been Tried". He gets Sarah to sign her consent on medical procedures/practices in the future. Not fully reading the consent form, Sarah signs hastily while wishing to be taken to Kira immediately. Later in the episode, he is seen prepping for surgery as he informs Sarah that she is about to have an oophorectomy.
Dr. Nealon is not heavily featured in the beginning of the season, only providing as a minor role alongside Delphine Cormier in a few episodes, until he and Delphine are deeply involved in Rachel's plan to escape the Dyad Institute.
Dr. Nealon orchestrates the escape of Rachel Duncan from Dyad and sends her to a Neolutionist stronghold to have her undergo surgery to receive a prosthetic eye. To keep the farce alive and prevent Delphine from finding out about his betrayal and Racehl's escape, he abducts and numbs Krystal Goderitch, dressing her to look like Rachel.
In "History Yet to Be Written", Delphine finally finds out about Rachel's escape and Dr. Nealon's part in this. She interrogates him and Dr. Nealon reveals that he was sent by Neolution. After Delphine refuses his offer to join the Neolutionists, he ambushes her and attempts to spit a deadly worm into her mouth that appears to have originated from his body. Before the worm can reach Delphine, however, Delphine manages to shoot and kill him. With his last breath, he tells Delphine that she will not live by morning and finally dies.
- Nealon's DYAD Institute employment record shows his ID tag as 1924-2763-N.
|Season 2 appearances|
|Nature Under Constraint and Vexed||Governed by Sound Reason and True Religion||Mingling Its Own Nature With It||Governed As It Were By Chance||Ipsa Scientia Potestas Est|
|To Hound Nature in Her Wanderings||Knowledge of Causes, and Secret Motion of Things||Variable and Full of Perturbation||Things Which Have Never Yet Been Done||By Means Which Have Never Yet Been Tried|
|Season 3 appearances|
|The Weight of This Combination||Transitory Sacrifices of Crisis||Formalized, Complex, and Costly||Newer Elements of Our Defense||Scarred by Many Past Frustrations|
|Certain Agony of the Battlefield||Community of Dreadful Fear and Hate||Ruthless in Purpose, and Insidious in Method||Insolvent Phantom of Tomorrow||History Yet to Be Written|