Marvin Gerard is a member of The Blacklist.
A Harvard alum and magna cum laude graduate, Gerard became the college's third youngest professor at the age of 31. He went on to serve as prosecutor for the state of New York for 3 years, after which he made partner at his father-in-law's criminal defense firm. While Gerard was being considered for a seat on the federal bench, his teenage son, Timothy, fell in with a bad crowd and, suffering emotional abuse from his mother, got addicted to medications prescribed to him by his psychiatrist. Gerard separated from his wife and filed for custody, but since his wife came from an influential family, he was not able to. He eventually went so far as to kidnap Timothy to keep him away from his mother, for which he was disbarred and sentenced to 7-10 years at Federal Correctional Institution, Cumberland. Timothy hung himself a year later. Gerard continued doing legal work behind bars, serving as shadow counsel to politicians, CEOs, and high-profile criminals, including Reddington, who apparently consulted with Gerard before he turned himself in to the FBI against Gerard's strong objections.
Gerard locates the vault where Peter Kotsiopulos is keeping his embezzled money.
When Red puts together a team to exonerate Liz, he calls in Gerard as part of that team. Gerard helps them plan on how to kidnap Peter Kotsiopulos. Once they have the Director, Red demands Laurel Hitchin exonerate Liz in exchange for Red not taking the Director to the Hague and sends in Gerard to discuss the terms of the deal with Laurel. Eventually Gerard manages to negotiate a deal where Liz is exonerated publically for all but the Tom Connolly murder as Liz killed him in front of witnesses and it wasn't in self-defense. Instead, Laurel offers a plea of involuntary manslaughter with 3 years probation. Gerard privately talks to Red and convinces him to take the deal as it will keep Liz safe and out of prison and is better than Gerard expected them to get. Gerard later presents the deal to Liz who reluctantly signs it as she will no longer able to be an FBI agent though she can remain on the task force in a similar capacity to Red. Thanks to Gerard's deal, Liz is later able to walk free.
Red believes Gerard poisoned him and is destroying his organization. He was the only person who didn't come to the dinner, but sent a bottle of wine instead. However, upon testing the wine turns out not to be poisoned. The culprit seems to have been Dembe, who gave Reddington some whiskey.
Gerard is kidnapped by a bounty hunter, Philomena, who works for Mr. Kaplan. When he refuses to turn against Reddington, Kaplan leaves him bound to a lamppost, and he is arrested by the police.
Gerard negotiates a deal with Ressler whereby he will be released in exchange for not revealing Ressler's connection to Reddington and the Task Force.
Reddington goes to work rescuing Gerard from his menial job at a toy store. Gerard, having lost his license to practice law thanks to Reddington, is not happy to see him but hears him out. Reddington leverages friendship with Al Roker to get an ethics review board to reinstate Gerard as a lawyer in good standing.
Marvin and Skip Hadley meet at a diner where Marvin is upset that Skip consolidated Raymond Reddington's accounts digitally instead of keeping them on analog ledgers. Elizabeth approaches and asks Marvin to join her in her vengence against Reddington, and Marvin turns her down. Later, Reddington and Dembe question Marvin, accusing him of booking a flight and hotel so that he can flee the nation-state. Reddington has Teddy Brimley torture Marvin to get him to confess. Reddington later learns that it was Skip who framed Marvin after stealing 35,000,000 euros (41,000,000 dollars) from Red's accounts. He has Teddy stop torturing Marvin and apologizes.
When Reddington calls Dembe, he asks whether Dembe talked to Marvin. Dembe says they can afford the retainer, indicating that Marvin is still working with Reddington's organization.
Marvin warns Reddington that his 2 year absence from the business has opened dissension in the ranks, with multiple parties moving to carve up Reddington’s business. Marvin tells Red he never should have named Elizabeth as his heir, and that the matter of Elizabeth’s murder is already resolved, with Townsend being wholly responsible.
After Heddie Hawkins is arrested for possession of pirated soybeans, Red sends Marvin to see her in lockup with an earpiece for her to receive Red’s coaching and instructions. Marvin protests his replacement as counsel by Kamina Gilford, who Red later reveals works for him and was there to test her loyalty. Marvin continues to try to persuade Red that his search for answers in Elizabeth’s murder is a waste of time.
Reddington calls on Marvin to defend Harold Cooper in his upcoming indictment. Marvin lists off Harold’s myriad violations to impress the seriousness of the charges on Red, who directs Marvin to the Post Office to speak to Harold. Marvin assures Red he can handle it, but that he has an appointment to keep before doing so. When Marvin arrives, and learns from Red of the connection between Reggie Cole and his attorney Tyson Lacroix, he assures Red that if Cole is burned, so is Lacroix.
Marvin visits Reddington in his trailer to alert him that money was moved from Red’s accounts at Caelum Bank. On Marvin’s advice, Red seeks the identity of the withdrawer, who he is certain is behind both Elizabeth’s murder and Harold’s blackmail, along with the murders of Tyson and Michelle Lacroix. Harold and Alina Park work the case from the Post Office, where they find a DVD housing the records of payments funneled through a network of attorneys. The attorneys identify a mastermind named Claudius who designed the system Tyson Lacroix was a part of, to scheme money out of clients. When Red learns the client identity on the withdrawal is identified as Heddie, Marvin jumps in to help Red interrogate Heddie, going so far as to bring a mutual contact of his to seal the evidence against Heddie. Harold and Aram, exhaustively searching Lacroix’s seized files, finally find their evidence, a Lacroix wedding video where Marvin gave the toast. Realizing what Marvin was doing, Red staged Heddie’s supposed revenge kill to lure Marvin out, receiving confirmation from Harold that Marvin, who is Claudius, is the enemy. In no uncertain terms, Marvin reveals he is behind everything, and that everything he did, he did to preserve Red’s empire. Marvin uses his considerable power to threaten Mierce’s life to leverage an escape from Red’s airplane.