Ep 1. New Allegiances

MI-5 season 7 episode 1, titled "New Allegiances," follows the aftermath of a terrorist attack that results in the killing of several prominent government leaders. MI-5 is tasked with identifying the culprits and stopping any further attacks.

As the team sets out to investigate, they encounter a former MI-5 agent who they previously believed to be dead. This agent, Lucas North, was believed to have been killed in action while working undercover in Russia. However, his sudden appearance raises suspicions about his loyalty and true intentions.

Despite concerns about Lucas, the team must work together to prevent another attack and uncover the true source of the initial bombing. The investigation takes them through the criminal underworld, as they attempt to track down leads and gather intelligence.

As the situation intensifies, tensions rise within the team and allegiances are put to the test. One member finds themselves at odds with the rest of the group, questioning the methods used and the potential consequences of their actions.

As the investigation reaches its climax, the team must rely on their training and expertise to bring the culprits to justice and ensure the safety of the public.

"New Allegiances" is a gripping episode that showcases the intense and complex work of MI-5 agents as they work to protect their country and its citizens against the threat of terrorism. Amidst the action and suspense, the episode also delves into the personal and emotional struggles of the characters, as they are forced to confront their own beliefs and loyalties.