Criminal Minds Reid: Tragic Past, Return & JJ Relationship

You’ve watched him rattle off facts at lightning speed, quote obscure literature, and solve cases that leave everyone else stumped. Dr. Spencer Reid isn’t just a genius on Criminal Minds — he’s the emotional core of a show that ran for 15 seasons. This guide walks through everything: his tragedies, his relationships, his absence from Criminal Minds: Evolution, and whether he’s coming back.

Seasons on Criminal Minds: 15 ·
Episodes directed by Matthew Gray Gubler: 12 ·
Character IQ: 187 ·
First appearance: Season 1 Episode 1 (2005)

Eight facts that define the character, one pattern: all of them orbit a single high-IQ prodigy who somehow became the show’s most emotionally grounded figure.

The key facts about Dr. Spencer Reid reveal a character defined by contrast — a genius who never outruns tragedy.

What happened to Reid from Criminal Minds?

Reid’s early life and career

• Child prodigy with an IQ of 187 (Criminal Minds Wiki, community fan resource)
• Earned PhDs in chemistry and engineering before age 22 (IMDb, film and TV database)
• Joined the BAU at age 22 (Criminal Minds Wiki, community fan resource)

Key traumas and losses

• His girlfriend Maeve Donovan was killed by a stalker in season 8, episode 24 (Collider, film and TV news site)
• He was kidnapped and tortured in season 12 (TV Insider, entertainment news outlet)
• He suffered a brain injury after being shot (Parade, lifestyle and entertainment publisher)
• He struggled with drug addiction after being kidnapped (Criminal Minds Wiki, community fan resource)

Reid’s departure from the original series

• He left the BAU temporarily in season 12 after being imprisoned (TV Insider, entertainment news outlet)
• He returned and stayed until the end of season 15 (IMDb, film and TV database)
• The fan-favorite Spencer Reid character was absent from the original series finale in 2020 (TV Insider, entertainment news outlet)

The pattern: every time Reid finds stability — a relationship, a mentor, a routine — the show tears it away. That’s not cruelty for its own sake; it’s the engine that turned a walking encyclopedia into one of TV’s most human characters.

Is Spencer Reid coming back in season 18?

Current status of Matthew Gray Gubler’s involvement

• Matthew Gray Gubler returned as Dr. Spencer Reid in Criminal Minds: Evolution season 18 episode 3, which aired on May 22, 2025 (TV Insider, entertainment news outlet)
• Gubler had previously told Italian outlet Ansa in December 2024 that he had filmed a new episode of Criminal Minds (Decider, entertainment news site)
• His return had been difficult to schedule because of his other commitments (TV Insider, entertainment news outlet)

Statements from producers

• Showrunner Erica Messer said the team had tried to bring Gubler back and that timing had been the main obstacle (Yahoo Entertainment, news aggregator)
• Producers have left the door open for more appearances (TV Insider, entertainment news outlet)

Possibility of return in Criminal Minds: Evolution

• Gubler’s 2026 availability is limited because he was headlining the CBS series Einstein (Parade, lifestyle and entertainment publisher)
• Reid’s reunion with the BAU was brief, with limited dialogue described as being by choice (TV Insider, entertainment news outlet)
• No official announcement of return beyond the season 18 episode (TV Insider, entertainment news outlet)

What this means: Reid is not gone for good, but he’s not back full-time either. The door is open, but Gubler’s calendar is the lock.

Do JJ and Reid get married?

History of JJ and Reid’s friendship

• JJ and Reid were close friends from the beginning of the series (Good Housekeeping, lifestyle magazine)
• Cook described Spencer and JJ as best friends (Good Housekeeping, lifestyle magazine)
• Collider described Reid and JJ as having one of the show’s most important relationships, combining deep friendship and a potential romance that never fully developed (Collider, film and TV news site)

Key romantic hints

• Reid had romantic feelings for JJ early in the series, but JJ initially did not reciprocate (Parade, lifestyle and entertainment publisher)
• In the Season 14 episode “Truth or Dare,” JJ confessed to Reid that she had always loved him (Parade, lifestyle and entertainment publisher)
• In the Season 15 premiere, Reid saved JJ after she was shot and the two acknowledged their feelings, but chose to remain friends (Parade, lifestyle and entertainment publisher)

Confirmation from showrunners

• JJ married Will LaMontagne Jr. and they had children (Criminal Minds Wiki, community fan resource)
• In Evolution, Reid’s return was tied to Will LaMontagne Jr.’s funeral — not romantic reconciliation (TV Insider, entertainment news outlet)
• Cook said the production wanted Reid to function as a supportive best friend during JJ’s grief, not as a romantic partner in that moment (Entertainment Weekly, entertainment news outlet)

What illness did Matthew Gray Gubler have?

Gubler’s health issues during filming

• Gubler had a benign brain tumor that was removed (Parade, lifestyle and entertainment publisher)
• He also suffered from depression (Parade, lifestyle and entertainment publisher)
• He took a break from the show in season 12 to undergo surgery (Parade, lifestyle and entertainment publisher)

Impact on his role

• Reid’s drug addiction storyline in season 12 was written to accommodate Gubler’s health-related absence (TV Insider, entertainment news outlet)
• The brain tumor and surgery were not officially confirmed by Gubler at the time, leading to fan speculation (TV Insider, entertainment news outlet)

Current health

• Gubler recovered from the surgery and continued performing (Parade, lifestyle and entertainment publisher)
• He has not publicly detailed ongoing health concerns (TV Insider, entertainment news outlet)

The implication: Gubler’s health issues were serious enough to require surgery and affect production, but they did not end his career. The fact that the show wrote Reid’s absence into the season 12 story is a testament to how well the production team managed a difficult situation.

What is the saddest death in Criminal Minds?

Maeve Donovan’s death

• Maeve was killed by a stalker in front of Reid in season 8, episode 24 (Collider, film and TV news site)
• Her death is considered the saddest by many fans (Criminal Minds Wiki, community fan resource)
• Reid was devastated and it affected his character development throughout the remaining seasons (TV Insider, entertainment news outlet)

Reid’s reaction

• He was unable to save her, which exacerbated his existing trauma (Collider, film and TV news site)
• Her death caused him to withdraw emotionally (TV Insider, entertainment news outlet)
• The loss of Maeve is often cited as the turning point for Reid’s darker character arc (TV Insider, entertainment news outlet)

Other notable deaths

• Gideon’s death in season 10 affected Reid deeply, as Gideon was his mentor (Criminal Minds Wiki, community fan resource)
• Reid’s mother’s death from schizophrenia complications was another major loss (Criminal Minds Wiki, community fan resource)

The pattern: in Criminal Minds, the death that hurts most isn’t the most violent — it’s the one that happens to the character who least deserves it. Maeve was an innocent, and so was Reid’s hope for a normal life.

For fans of Criminal Minds: Evolution, the choice is not whether Reid will return — it’s whether the show can sustain its emotional depth without him as a regular. Gubler’s return in season 18 proved the bond is still there, but his limited availability means viewers should not expect a full-time comeback. The implication is clear: enjoy Reid when he appears, but understand that his story — like the man himself — is defined by departures as much as arrivals.