Guest
C. Thomas Howell as Carson Wolf: A corrupt senior DHS agent, supervisor of "Operation Cerberus", and Madani's supervisor who crosses paths with Micro and then later Castle. Wolf is revealed to be corrupt, working for Rawlins, who had Wolf frame Micro for being a traitor, and seemingly killed Micro, though Micro survived the attempt on his life. Wolf is captured and interrogated by Frank, before being killed after attempting to kill Frank.
Delaney Williams as O'Connor: A racist phony Vietnam veteran and NRA member who attends Hoyle's support groups. O'Connor is killed by Wilson for faking his military service.
Lucca de Oliveira as Donny Chavez: a newly appointed construction worker in New York City who tried to make friends with Castle.
Chris Critelli as Lance: a construction worker and low-level criminal who would often mock Castle.
James J. Lorenzo as Tony Gnucci: a member of the Gnucci Crime Family, an Italian-American criminal organization based in New York City.
Geoffrey Cantor as Mitchell Ellison: The editor-in-chief of the New York Bulletin and Page's boss. Cantor reprises his role from Daredevil.
Shez Sardar as Ahmad Zubair: An Afghan policeman who worked with Madani.
Jeb Kreager as Gunner Henderson: A Marine Corps veteran and member of the Cerberus Squad that worked alongside Castle and later went reclusive upon returning home. Gunner later reunited with Castle and helps him kill multiple Anvil agents sent to kill Gunner; Gunner is shot in the abdomen by one and bleeds to death.
Clancy Brown as Ray Schoonover: Castle's commanding officer in Afghanistan. Brown reprises his role from Daredevil.
Tim Guinee as Clay Wilson: Lewis Wilson's father who works to help his son get adjusted to his civilian life.
Rob Morgan as Turk Barrett: A low-level criminal who operates in Hell's Kitchen and Harlem. Morgan reprises his role from previous Marvel Netflix shows.
Mary Elizabeth Mastrantonio as Marion James: A Deputy Director of the CIA.
Andrew Polk as Morty Bennett: A colonel who was a member of Cerberus Squad and worked under Rawlins. Morty is killed by Russo after being used as bait for Castle.
Rick Holmes as Stan Ori: A U.S. Senator who is interviewed by Karen Page on his gun control views.
Houshang Touzie as Hamid Madani: Dinah's father who is a doctor.
NY1 anchors Pat Kiernan, Roma Torre, and Stacy-Ann Gooden cameo as themselves.
Alexa Davalos as Beth Quinn: A single mother in Ecorse, Michigan who runs Lola's Roadhouse and briefly takes an interest in Castle.
Jagger Nelson as Rex Quinn: Beth's son who takes a liking to Castle.
Avery Mason as Ringo: A bouncer and bodyguard who works at Lola's Roadhouse.
Michael Pemberton as Lieutenant Ferrara: a corrupt police officer contacted by Pilgrim to cover his activity in Michigan.
Teri Reeves as Marlena Olin: A tough mercenary who works for Pilgrim.
Alex Notkin as Sergei Konchevsky: An ally to Amy who gets tortured by Pilgrim.
Joe Holt as Sheriff Roy Hardin: A tough and disciplined sheriff in Larkville, Ohio who aids Castle.
Brandon Gill as Deputy Ken Ogden: One of Hardin's deputies and Bruce's brother.
Jamie Romero as Deputy Murphy: One of Hardin's deputies.
Rudy Eisenzopf as Deputy Dobbs: One of Hardin's deputies.
Donald Webber Jr. as Bruce Ogden: An inmate at Larkville County Sheriff Station and Ken's brother.
Ilia Volok as Kazan: A Russian gang member.
Keith Jardine as a Russian thug under Kazan's employ.
Allie McCulloch as Rebecca Pilgrim: Pilgrim's loving and sick wife.
Zell Steele Morrow as Michael Pilgrim: Pilgrim's son.
Henry Boshart as Lemuel Pilgrim: Pilgrim's son.
Thomas G. Waites as Arthur Walsh: A pedophilic foster parent who sexually abused Russo as a child.
Charles Brice as Bobby: A fellow veteran who is part of Billy Russo's crew
Brett Diggs as Anton: A fellow veteran who is part of Billy Russo's crew
Dikran Tulaine as Nikolai Poloznev: A Russian businessman and gangster.
Todd Alan Crain as David Schultz: A senator and the Schultzes' gay son.
Derek Goh as Danny: a young member of Pilgrim's former gang who he hired to track down both Castle and Bendix.
Jordyn DiNatale as Shantel: Bendix's friend who lives in New York City and former member of Fiona's Crew hired by Konchevsky.
Kevin Chapman as Kusack: An old acquaintance of Pilgrim who is a white supremacist.
Joseph D. Reitman as "Creepy" Ed Zatner: A mortician and ally of Karen Page with a strange obsession with women's shoes.
Shooter Jennings, Ted Russell Kamp, James Douglass, John F. Schreffler Jr. and Aubrey Richmond all appear as themselves.
