Content & Trigger Warnings for Star Trek: Discovery (2017)

The Klingon war is partly driven by xenophobic ideology about racial purity; 'Remain Klingon' is a supremacist rallying cry

The Red Angel signals invoke religious interpretation; Pike's Klingon monastery visit explores faith; themes of belief vs. science

The Burn was caused by a traumatized child whose distress resonated through dilithium; the child's suffering and isolation are central to the mystery

Burnham's mother is revealed to be the Red Angel; their separation and reunion involves themes of parental loss and sacrifice

Parental death is a significant plot element for the main character Michael Burnham

Burnham grieves her role in starting the Klingon war and the death of Captain Georgiou; survivors process massive wartime losses

The death of Airiam deeply affects the crew; Burnham grieves her separation from everyone she knows when she travels to the future

Burnham arrives 930 years in the future to find the Federation collapsed after a catastrophe called the Burn; grief over a lost civilization pervades the season

Book grieves the destruction of his homeworld Kwejian; his trauma drives him toward extremism and strains his relationship with Burnham

Burnham and crew face the knowledge that this may be their final mission together; themes of legacy and moving on

Pike sees his own future paralysis and disfigurement from a training accident; he chooses to accept this fate rather than change the timeline

Ash Tyler/Voq's implanted identity means he unknowingly deceives everyone around him; Lorca manipulates the entire crew for his Mirror Universe agenda

Section 31 operates with deception and manipulation; Control disguises its intentions while corrupting Starfleet systems

Osyraa and the Emerald Chain use manipulation and false diplomacy to infiltrate the Federation

Tarka manipulates Book into supporting his plan to destroy the DMA, exploiting Book's grief for his own selfish ends

Moll and L'ak deceive and manipulate others in their pursuit of the Progenitor technology; rival factions compete through deception

The Federation considers using a weapon to destroy the Klingon homeworld; the moral dilemma of genocide as a war-ending measure is debated

Book's homeworld Kwejian and its entire population are destroyed by the DMA; the loss of an entire world drives the season's moral questions

Characters are captured and held prisoner in multiple storylines

The DMA is a massive gravitational anomaly that destroys planets; its approach creates catastrophic destruction on a planetary scale

Full-scale war between the Federation and the Klingon Empire; space battles with mass casualties; ground combat with graphic violence

Less emphasis on war compared to Season 1; conflict with a rogue AI called Control provides the primary threat with some space combat

Scattered conflict in a fractured future; the Emerald Chain poses a military threat; less large-scale war than Season 1

Species 10-C poses an existential threat through the DMA (Dark Matter Anomaly); diplomatic tension rather than conventional war dominates

The Breen emerge as a threat seeking the Progenitor technology; space combat and military confrontations in the final episodes

Burnham is convicted of mutiny and sentenced to life in prison; Lorca is held prisoner by Klingons; Mirror Universe features brutal imprisonment

Blood visible in combat sequences and Klingon rituals; the show does not shy away from the physical reality of war wounds

Some blood in combat and aftermath scenes; less pervasive than Season 1

Voq is surgically transformed into a human in a horrific procedure; the spore drive interface requires painful biological integration; Klingon corpse ship is grotesque

Control takes over human bodies using nanobots in disturbing Borg-like assimilation scenes; Airiam's cybernetic corruption is unsettling

Su'Kal has been trapped alone on a dilithium planet for over a century; the isolation and confinement are psychologically harrowing

Approaching Species 10-C's hyperfield creates claustrophobic tension; the diplomatic vessel enters an enclosed alien structure

Several clue locations involve tight spaces and underground environments; puzzle-solving in enclosed areas

Dilithium scarcity creates an allegory for resource addiction; the Emerald Chain operates as essentially drug dealers controlling a scarce resource

References to childhood trauma and abuse experienced by characters in their backstories

Klingon combat is bloody and visceral; bodies are mutilated in battle; T'Kuvma's followers collect the dead and decorate their ship with corpses

Control assimilates and kills people in disturbing ways; nanobots consume bodies; some graphic violence in combat sequences

Some combat violence and aftermath; less graphic than earlier seasons as the tone shifts toward rebuilding

Moderate violence in action sequences; the season focuses more on diplomacy than combat

Action sequences with moderate violence; the treasure hunt format keeps the tone lighter than earlier seasons

Phaser and disruptor combat throughout; characters are shot and killed in both space and ground battles

Phaser combat in several episodes; less frequent than Season 1 but still present in action sequences

Phaser combat in action sequences; the 32nd century weapons are more advanced but violence remains moderate

Some phaser combat in confrontation scenes; the season's conflict is primarily ideological rather than physical

Phaser combat during confrontations with Moll and L'ak; action-adventure level violence throughout the treasure hunt

A character sacrifices themselves and themes of self-sacrifice appear throughout the series

It is strongly implied that Ash Tyler was sexually assaulted by the Klingon L'Rell during his captivity; the trauma significantly affects him

Captain Lorca is captured and tortured by Klingons; Voq undergoes an agonizing surgical transformation; the spore drive causes Stamets physical suffering

Book's planet was destroyed and he carries deep trauma; the Emerald Chain uses coercion and captivity against its enemies