Mother

S1, E5: Criminals John Wicke and his wife, Helen, obtain a nuclear trigger, intending to sell it to the highest bidder. During a failed purchase attempt, four Section One operatives die in an explosion. Helen continues her search for a child she put up for adoption while still a teenager--and a prison inmate. In a scheme devised by Section One, Nikita pretends to be Helen's long-lost daughter. Nikita kills John while searching for the trigger. Posing as police officers, Michael and a group of operatives arrest Nikita and her "mother" and beat Nikita to force Helen to reveal information about the trigger in order to save her supposed daughter.