True-crime bingers, mark your calendars: Investigation Discovery is opening the vault to humanity’s darkest minds once again. The series “Signs of a Psychopath” returns for a brand-new season on Tuesday, August 11, 2026. It will deliver back-to-back episodes at 9:00 PM and 9:30 PM ET/PT on ID (and streaming on Max).
Even bigger news for long-time watchers? This season marks the show’s 100th episode milestone.
Using raw interrogation footage and the chilling confessions of the killers themselves, the show cuts through the noise. It analyzes the exact moments narcissism, delusion, and depravity curdle into cold-blooded murder.
Premiere Night Double Header (August 11)
-“I Guess I’m a Maniac” (9:00 PM ET/PT): A Florida cold case regarding a strangled woman goes unsolved for nearly a decade—until a surprise confession unmasks a deviant sexual psychopath fulfilling a dark fantasy.
-“I Don’t Belong Here” (9:30 PM ET/PT): A disturbed man readily confesses to slaughtering three generations of his family. As he takes credit for decade-old cold cases, detectives realize his goal is to return to prison at any cost.
The Milestone 100th Episode (September 15)
To celebrate 100 episodes of pure psychological horror, ID is dropping a special one-hour event at 9:00 PM ET/PT:
-“I Had Everybody Fooled”: A woman covered in blood rushes to the hospital with a barely breathing newborn. Medical staff quickly realize her frantic birth story is a complete fabrication, leading investigators to uncover a violent, infant-stealing psychopath.
Full Season Episode Slate
Grab your notepad and lock your doors—here is what else is coming to your screen this fall:
-August 18: A runaway teenage couple turns into thrill-killing spree murderers (“I Can’t Stop Myself”), followed by the horrifying discovery of a missing mother hidden inside her own septic tank (“Violence is What I’m Fixed On”).
-August 25: Motorists discover a Christmas Eve roadside massacre linked to a militant vigilante fantasy (“I Think I Can Outsmart God”), followed by an estranged husband whose polite demeanor masks a rage-filled killer (“I Just Wanted to Hurt Her”).
-September 1: A 17-year-old grandson turns on his elderly grandparents (“I’ve Got a Criminal Mind”), followed by a grandson spinning a twisted tale about finding his grandmother in a freezer (“I Wanted to Keep Her”).
-September 22: A grim family annihilator leaves his family decomposing post-holidays (“The Apocalyptic End”), followed by a newlywed accused of decapitating his wife (“Something Took Control of Me”).
-September 29: A troubled teen harbors a deadly fantasy inside a neighbor’s closet (“The Biggest Adrenaline Rush”), followed by an estranged husband enacting a movie-inspired revenge attack (“That’s What You Do With a Knife”).
-October 6: A fatal car crash reveals a dead passenger and a dangerous fugitive driver (“Can You Count Bullets?”), followed by a frantic 911 call that exposes two young, parasitic killers (“Everybody Believes in Bad People”).
-October 13: DNA technology solves a decade of cold-case highway assaults (“Every Time Was Like Christmas”), followed by a plot twist where a third-party tip uncovers two cold-blooded killers (“He Got Such a Rush From It”).
-October 20: A son’s emotional 911 call about his mother and dog falls apart in the interview room (“Evilness Inside My Head”), followed by a lost SD card that hands police video evidence of an Anchorage murder (“That’s When My Nightmare Started”).
Produced by Red Marble Media, “Signs of a Psychopath” continues to prove that life is far more terrifying than fiction. Join the conversation on ID using #SignsOfAPsychopath on social media, and tune in August 11 for the premiere. Follow on Facebook, Instagram, TikTok, X and YouTube for exclusive content.
