The tenth and final season of the British espionage thriller "MI-5" (also known as "Spooks") marks the culmination of the long-running series with high-stakes political intrigue and personal drama. Harry Pearce, portrayed by Peter Firth, returns to lead Section D after a period of absence, only to find himself embroiled in a delicate and dangerous proposition from his Russian counterpart, Ilya Gavrik, played by Jonathan Hyde. Gavrik suggests an unprecedented strategic partnership between the UK and Russia, a move that could reshape global alliances but also invites fierce opposition from hidden adversaries.   The season introduces two new agents to the team: Erin Watts, a sharp and determined operative played by Lara Pulver, and Calum Reed, a tech-savvy analyst portrayed by Geoffrey Streatfield. Together, they navigate a labyrinth of deception, uncovering plots by shadowy factions determined to sabotage the proposed alliance. As tensions escalate, the team races against time to prevent a catastrophic conflict that could plunge both nations into war.   Betrayals, moral dilemmas, and explosive action define this final chapter, testing the loyalty and resilience of Section D. With the fate of the partnership hanging in the balance, Harry and his team must confront their own demons while outmaneuvering enemies both foreign and domestic. The season delivers a gripping conclusion to the series, blending intense spycraft with emotional depth as the characters face their most perilous mission yet.