The Equalizer Season 2 Episode 14 : Pulse

McCall receives a desperate plea for help from her former CIA trainee, now a full-fledged agent, that leads her into a confrontation with Mason Quinn (Chris Vance), the most dangerous enemy from her past in intelligence. In need of confidential information about the agent's latest assignment, McCall forms a tentative alliance with Carter Griffin (Brett Dalton), a by-the-book CIA handler.