Canadian actor Christopher Russell portrays Milton Richter in Star Trek: Discovery. His many film and television credits over the past two decades span from Kevin Hill, Land of the Dead, Supernatural and Flashpoint to Girlfriends' Guide to Divorce, iZombie, Reign and Dirk Gently's Holistic Detective Agency

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Conrad Pla is the actor who played Stone in the Star Trek: Discovery episode "Context Is for Kings." Born in Spain and raised in Canada, Pla counts among his dozens of credits such shows and features as Dead Awake, The Sum of All Fears, Mutant X, The Terminal, ReGenesis, Casino Jack, Immortals, Riddick, Rogue, Quantico, The Expanse and Taken.

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Anthony Rapp, Lt. Paul Stamets on Star Trek: Discovery, was born in Chicago and raised in Joliet, Illinois. An acclaimed actor and singer, he is most recognized for playing Mark Cohen in the off-Broadway and Broadway productions of the musical Rent, as well as in the film adaptation.

His other stage work includes You’re a Good Man, Charlie Brown, Little Shop of Horrors and If/Then, and among his film and television credits are School Ties, Twister, A Beautiful Mind, The Lazarus Man, The X-Files, Law & Order: Special Victims Unit and The Knick. Rapp also, in 2000, released an album titled Look Around. 

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Context Is for Kings

Michael Burnham finds herself aboard the U.S.S. Discovery, where she quickly realizes things are not as they seem, including the mysterious Captain Gabriel Lorca.

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A multi-legged micro-animal that lives in the waters of Earth and is capable of surviving extreme heat and sub-freezing temperatures. 

In the mid-23rd century, Michael Burnham discovered a macro-size version of the species that is sensitive to light and attracted to mushroom spores.

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(Portrayed by Mary Wiseman)

Ensign Sylvia Tilly started off her journey aboard the U.S.S. Discovery as a freshly minted Starfleet Academy cadet, all wide-eyed, good-natured, full of nervous excitement and humor, and determined to one day become a Starfleet captain. She took an immediate liking to her new roommate, Michael Burnham… the mutineer. The two women soon forged a friendship, with Burnham providing mentorship and Tilly helping Burnham relax, fit in and temper her Vulcan logic in favor of being more human. 

During the Federation-Klingon Empire war, Tilly grew up quickly. She witnessed death and destruction, but also mercy, love and heroism. Along the way, she worked closely with the initially cranky and impatient Lt. Stamets to develop the spore drive and she gained the respect of Saru. Tilly also surprised everyone, including herself, after the Discovery entered the Mirror Universe and she had to pretend to be the far tougher Mirror Tilly, better known as Captain Killy thanks to her exploits in pursuing rebels.

Once the war was won, Tilly was bestowed with the Starfleet Medal of Honor and promoted to ensign. As such, she is on the command track, with her goal of sitting in a captain’s chair – for real – in her sights.

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An organism that feeds on electricity. In the mid-23rd century, a shuttle carrying Michael Burnham and three other prisoners was disabled when GS54 begins feeding on the shuttle's power system. 

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Sweeny is a writer and consulting producer on Star Trek: Discovery. His previous credits include The 4400, Medium, Common Law, Elementary and Limitless.

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Oyin Oladejo, who appeared as Lieutenant Junior Grade Joann Owosekun in the Star Trek: Discovery episode "Context Is for Kings," is a Toronto-based actress who hails from Nigeria. After graduating from Humber College`s Theatre Performance Program, Oladejo has amassed such in plays, films and shows as In This World, A Doll's House, TomorrowLove and Pond.

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Rekha Sharma, who hails from Vancouver, British Columbia, Canada, co-stars on Star Trek: Discovery as Commander Ellen Landry, the Discovery’s security officer. Sharma is perhaps most recognized for her roles as Tory Foster on Battlestar Galactica and Dr. Lorelei Tsing on The 100. Among her other film and television credits are The Outer Limits, The Core, Smallville, Aliens vs. Predator: Requiem and CSI: Crime Scene Investigation.

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Glenn NCC-1030, U.S.S.

The U.S.S. Glenn NCC-1030 was a Federation Crossfield class starship in the mid-23rd century that was researching a new, experimental organic-propulsion system along with the U.S.S. Discovery. An unexpected incident occurred during black alert manuevers testing the new propulsion system resulting in the death of the entire crew. 

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Laryngotracheal Stenosis

An abnormal narrowing of the central air passageways that can cause chronic snoring and a dry throat. Sylvia Tilly was born with the condition.

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Sara Mitich plays Lt. Commander Airiam, a synthetic-human hybrid aboard the U.S.S. Discovery, on Star Trek: Discovery. Originally from Hamilton, Ontario, Mitich's previous television and film credits include The Listener, Joy Ride 3: Road Kill, Heroes Reborn, Murdoch Mysteries, The Expanse, White Night and Anon.

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Elias Toufexis played Cold in the Star Trek: Discovery episode "Context Is for Kings." The Canadian actor has performed on stage, in films and video games, and on television, and is also both a voiceover artist and motion-capture veteran actor. His counts among his credits Decoys, Da Vinci's Inquest, Stargate: Atlantis, Smallville, Supernatural, Splinter Cell: Blacklist, Bitten, Len and Company, The Expanse and The Long Dark

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(Portrayed by Anthony Rapp)

Lt. Commander Paul Stamets is the U.S.S. Discovery’s science officer and chief engineer, and was the partner of the late Dr. Hugh Culber. Brilliant, awkward, outspoken and not keen to make friends, his expertise is astromycology, meaning he knows more than anyone about space mushrooms and the vegetative part of a fungus called mycelium. Stamets collaborated with Lt. Straal, conducting research to "get to the living heart of the universe, the veins and muscles that hold our galaxies together." However, the Federation co-opted their research at the start of the Klingon-Federation War in order to develop an organic-propulsion system. Stamets was assigned to the Discovery, while Staal was assigned to the U.S.S. Glenn in order to expedite their research. 

Captain Lorca of the Discovery saw in their research the possibility of jumping through space at unimaginable speeds. Though he professed to pushing Stamets and Staal so hard in order to defeat the Klingons, his ulterior motive was to return to the Terran Universe and overthrow Emperor Georgiou. Staal, believing he’d made progress, tested the drive, but died along with everyone else on the Glenn. Stamets forged on, impatiently working with Cadet Tilly. Eventually, they harnessed the spore drive, with Stamets plugging into it as an organic navigator. The drive worked, and Lorca took advantage of it, giving the Klingons a run for their money and getting closer to home.

However, the jumps took their toll on Stamets, leaving him catatonic, but functioning within the mycelial network. When the Discovery crossed into the Mirror Universe, Stamets and Mirror Stamets came face to face, and Stamets was able to say goodbye to Dr. Culber, who'd been killed by Ash Tyler. Tilly soon revived Stamets, who then helped destroy the I.S.S. Charon and guide the Discovery back to the Prime Universe. 

For his efforts, Stamets received the Starfleet Medal of Honor and a promotion to Lt. Commander. He also accepted the Starfleet Medal of Honor on Dr. Culber’s behalf.

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A Starfleet prisoner in the mid-23rd century that was being transported to Tellum along with Michael Burnham and two other prisoners when their shuttle was intercepted by the U.S.S. Discovery

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Prototaxites Stellaviatori

A fungal species used by Paul Stamets for mycelium spores.

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(Portrayed by Christopher Russell).

A communications officer on the U.S.S. Discovery.


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An astromycologist conducting research with Paul Stamets to "get to the living heart of the universe. The veins and muscles that hold our galaxies together." The Federation co-opted their research at the start of the Klingon-Federation War in order to develop an organic-propulsion system. Staal was assigned to the U.S.S. Glenn as a Science Officer while Stamets was assigned to the U.S.S. Discovery to expedite their research. Straal was killed, along with the entire crew of the U.S.S. Glenn, during black alert manuevers testing the new propulsion system.

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The name given by Michael Burnham to the tardigrade found on the U.S.S. Glenn following the ship's failed propulsion experiment. Ripper was beamed aboard the U.S.S. Discovery by Captain Lorca in the hopes the creature could offer a tactical advantage in the war against the Klingon Empire.

Commander Landry was killed by Ripper while trying to expedite its analysis. Later, Burnham would correctly hypothesize that Ripper was the solution to the organic-propulsion drive experiment.  

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