• 第01集
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• 第03集
• 第04集
• 第05集
• 第06集
• 第07集
• 第08集
• 第09集
• 第10集

　　Season four of espionage drama "MI-5" finds the team reeling from the loss of Danny (David Oyelowo), but thrown back into action when a bomb detonates near his funeral. Zafar Younis (Raza Jaffrey) and Juliet Shaw (Anna Chancellor) are introduced to the show, in a story involving a potentially devastating terrorist attack in the capital. Later in the season Lyndsay Duncan guest stars as a former MI-5 officer with a deadly grudge, one which threatens the lives of everyone back at The Grid.