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Ethan Locken was a genetically engineered Human and a former member of Section 31. He was a great admirer of Khan Noonien Singh. Locken was in his thirties or forties in 2376, and had short cut red hair that had receded into a widow's peak. He was neither tall nor physically imposing, but his eyes were a dark brown or almost black color.

Locken was, by any account, a brilliant scientist. He used his genetically enhanced abilities to work on medical advances in long-term stasis, cloning, DNA resequencing, memory engram transfer, and other similar pursuits.


Ethan Locken was a doctor, and worked as a pediatrician on New Beijing. At some point during the Dominion War, false intelligence was given to the Dominion that biogenic weaponry was being developed on New Beijing. The Dominion sent the Jem'Hadar to wipe out the planet; Locken was the only survivor, having found a safe place to hide by Doctor Murdock, who was undercover Section 31 operative Cole. Following the destruction, Locken was recruited by Section 31, realizing the need for such an organization.

In January 2376, Locken and a Section 31 team were assigned to investigate a Jem'Hadar hatchery on the planet Sindorin in the Badlands, where Section 31 hoped to create a breed of Jem'Hadar loyal to the Federation for use in any upcoming conflict. For the first few weeks, Locken reported in at regular intervals, but then became sporadic and eventually lost touch in March. Locken had discovered a way to produce Jem'Hadar loyal to him, and betrayed Section 31 to follow his own gains, intending to provoke a war between the Federation and the Romulan Empire.

In April, Cole approached Bashir on Deep Space 9 and asked Bashir to stop Locken. Later on Sindorin, while Bashir distracted Locken, Ezri Dax was able to damage Locken's equipment so that his attempt to attack Romulan forces on Orias III and frame the Federation for the attack failed. Locken was subsequently killed by his own Jem'Hadar, whose DNA had been slightly altered to remove their loyalty to him. (DS9 - Section 31 novel: Abyss)

Alternate realities

In a timeline where Khan Noonien Singh had won the Eugenics Wars, Locken served in the Earthfleet and was noted as a fellow Princeps and rival to that of Julian Bashir by the Benjamin Sisko of that dimension. Locken commanded the Prometheus. (DS9 novel: Seeds of Dissent)

Background information


Known members and associates of Section 31
primary universe Olivia AkomoCaliq AczuraJulian BashirGabrielle BurnhamMike BurnhamLance CartwrightColeKatrina CornwellControlDietzMatthew DoughertySarina DouglasFranklin DrakeEnderbyDarwyn FrielKamran GantPhilippa GeorgiouMatthew HarrisJedburghKarimBendes KettaractKen KitsomKo Ji-hoonJhun KulkarnoL'HaanPeter LawrenceLeeLelandEthan LockenRoberta LukeMerraErovan M'RillOlim ParraPatarTinh Hoc PhuongErik PressmanRamirezParvati RaoMalcolm ReedTomas RoederWilliam RossConnaught RossaSakonnaLuther SloanEric StillwellAubin TaborMalla TancredaKestellenar th'TeshinaalCharles Tucker IIIAsh TylerDavid WebbMarcus WilliamsVasily ZeitsevCortin Zweller Section 31 Starfleet black badge image. 31
Kelvin timeline Thomas HarewoodJohn HarrisonRobert AprilAlexander MarcusYuki Suluunnamed Section 31 personnel