Canadian actor, known for The Expanse and Big Love, who played the brilliant and reckless Risian scientist Ruon Tarka in the fourth season of Star Trek: Discovery.
Shawn Doyle is a Canadian actor, born in 1968, whose television work includes Big Love, Frequency, House of Cards and the politician Sadavir Errinwright in The Expanse.
In the fourth season of Star Trek: Discovery he plays Ruon Tarka, a Risian physicist brought in to study the Dark Matter Anomaly. First seen in The Examples, Tarka is arrogant and gifted, and he hides a private aim: to use the anomaly's power source to cross to another universe and rejoin his friend Oros, with whom he was once imprisoned by the Emerald Chain.
Tarka draws Cleveland Booker into an unsanctioned plan to destroy the anomaly with an isolytic weapon. He dies in the season finale, Coming Home, when Booker's ship is destroyed.