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Ex Post Facto

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"Ex Post Facto" was the 8th episode of Star Trek: Voyager, in the show's first season, aired on 27 February 1995. The episode was written by Evan Carlos Somers and Michael Piller and directed by LeVar Burton.


When Tom Paris is falsely accused of murdering the Banean scientist Tolen Ren by the dead man's widow, Lidell, his assigned punishment is to relive the dying moments of his supposed victim over and over again.



ChakotayThe DoctorKathryn JanewayHarry KimNeelixTom ParisB'Elanna TorresTuvokKesLidell RenKrayunnamed Baneans (Banean doctor, guards) • Tolen Renunnamed Numiri (Numiri captain, officers) • unnamed USS Voyager personnel (operations division lieutenant, operations division ensign, ensign, security crewman) • CulhaneKashimuro Nozawa
Referenced only 
Jonas SalkBenjamin SpockT'PelGalen

Starships and vehiclesEdit

USS Voyager (Intrepid-class cruiser) • Numiri patrol shipBanean warshipunnamed type-8 shuttlecraft (Voyager type-8 shuttlecraft)
Referenced only 


Banean homeworld/Banea (Banea/Banean star system, the galaxy's Delta Quadrant)
Referenced only 
Teluridian IV (Teluridian star system, the galaxy's Alpha or Beta Quadrants); Numiri star system, the galaxy's Delta Quadrant

Shipboard areasEdit

USS Voyager 

Races and culturesEdit



animalplanthumanoidBanean dog

Technology and weaponsEdit

collimatorcommunicatorhologramnavigational deflectorspacecraftshuttlecraftstarshiptransporterviewscreenLN2 exhaust conduitmicroscopenavigational arrayneural implantphase emitterregenerative shield

Materials and substancesEdit


Food and beveragesEdit

marob root tearolk stew

States and organizationsEdit

FederationStarfleetBanean Engineering Institute
Referenced only 

Ranks and titlesEdit

captainchief engineerchief medical officercommanding officerdoctorengineerensignFederation Starfleet ranksFederation Starfleet ranks (2360s-2370s)first officerlieutenantlieutenant commanderlieutenant junior gradeflight controllermedical practitioneroperations managernursecookofficersecond officersecurity chieftactical officerengineering physicistBanean Minister of Science

Other referencesEdit

anatomybeamingclothinggovernmenthomeworldhairjumpsuitlanguagelifeformlogicmattermemorynation-stateorbitpantsplanetpopulationpsychologyquadrantraces and culturesrankspacestarstar systemstardateStarfleet uniformStarfleet uniform (2366-2373)technologytitleuniformuniversewarweaponatriumautonomic response analysisaway teamARAcloud burstdefense perimeterdehydrationeclipseequationlethal injectionlogicmemory engramNeekaneural pathwayneurologyneurological analysispancreatic scanred alertsmokingstormsynaptic failuretelepathyVulcan mind meld


years prior to 2371 
The Baneans and Numiri become enemies. (prior to episode)
2371 (2370s chronology, Voyager's journey
Voyager travels near Banea.


Related storiesEdit

Voyager journey 2371-48532

Map of vicinity.




published order
Previous episode:
Eye of the Needle
Voyager episode produced Next episode:
Previous episode:
Eye of the Needle
Voyager episode aired Next episode:
chronological order
Previous Adventure:
Prophet Motive
Pocket Next Adventure:
Previous Adventure:
Eye of the Needle
Journey of the USS Voyager Next Adventure:

External linksEdit

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