Ballet teacher Francois Duval dies on the street after a brief encounter with an apparent pickpocket. Boyfriend Ryan hated how he made his bride toil her tutu-fit tail off, but is just a barker. Sarah finds he was murdered with Novitjok, the Russian spy poison. Canadian secret agent Liu remains secretive, ending up killed himself, as the team works out Duval was an alias for a Russian mole, specialist in giving people a new identity with forged papers. He actually used his counterfeit art to help his protegee to a New York dream ballet, but also Russian geology professor Dasha Fedorov, in the very field relevant to the conflict Arctic waters claims, who was tailed by FSB agent Simon Petrov, who will stop at nothing, even poisons Charlie's car handle, luckily smelled by Rex, who also helps using, the antidote Sara gave them just in case.
—KGF Vissers