Several old college friends converge at a mansion, ostensibly for a pleasant reunion. Larry Dann, the most easygoing of the bunch, comes to the conclusion that all is not well in the old dark house. For one thing, he's run across several people whom he's never met. For another, they all seem to be of a different time and place.

冷战时，全球两大特工组织——俄罗斯“中心”与英国“圆场”明争暗斗。总管发现情报局内部潜伏着一名克格勃，怀疑对象就是包括总管助理乔治在内的几名情报局核心成员：锅匠，裁缝，士兵，穷人，乞丐。老总为查清事情策划了一次跨国间谍活动，结果惨遭失败，不久就在内部权力倾轧中失利引退。同时，也连累一批情报官员被清洗出局，其中也包括被提前退休的乔治。乔治本来有重大嫌疑，英国内阁办公室谍报总监排除了嫌疑，委托他调查内奸。于是乔治开始分别走访故人。一时间，圆场疑云密布，人人自危，究竟谁才是“地鼠”……

Soldiers are captured and interrogated by terrorists: but is it real or only a sadistic form of psychological training exercise?

Set in an alternative 1970s where Germany won the Second World War and occupied Europe, a soap opera called 'An Englishman's Castle' plays out through writer Peter Ingram.

Set in an alternative 1970s where Germany won the Second World War and occupied Europe, a soap opera called 'An Englishman's Castle' plays out through writer Peter Ingram.