An intergalactic fighting competition between champions of various worlds has traditionally been won by a species much larger and stronger than humans. Entering the contest, a human finds he has to battle against not just his opponents and his self-doubts, but the corrupt system. Far in the future, on a distant space station, the legendary Arena is where the best fighters from every planet come to vie for the championship. But for over half a century, no Earthling has been good enough to be a contender. Until out of nowhere, comes an underdog: the great human hope, Steve Armstrong... and the best anyone's ever seen. He's been training all his life for a shot at the big time, but now he's up against some mighty big muscle: a ruthless extra-terrestrial crimelord who'll pull no punches to make sure he stops Steve dead. In the mood for hard-hitting sci-fi action? Arena will knock you out!

艾伦（John Wesley Shipp 饰）出生于警察世家，他的哥哥杰（蒂姆·汤默逊 Tim Thomerson 饰）是摩托骑警队队长，而艾伦自己则是犯罪化验室的研究专员。近日，城市里出现的飞车党让市民们深感不安，这群暴徒们烧杀抢掠无恶不作，成为了破坏城市和平的蛀虫。
飞车党又犯下一宗罪行，艾伦采集了现场留下的泥土作为证据带回实验室研究，没想到，在研究过程中发生了爆炸，一道闪电击中了艾伦。本以为自己必死无疑的艾伦幸运地死里逃生，却因为电击而获得了超能力，从此化身成为闪电侠。飞车党的头目派克（Mariko Tse 饰）一直都对杰怀恨在心，一次行动中，杰不幸牺牲，而艾伦则继承了哥哥未完成的使命，誓要将派克捉拿归案。

The Sentinel is a Canadian-produced television series that aired on UPN in the United States from 1996 to 1999. It premiered on March 20, 1996, and ran for 65 episodes (three and a half seasons).
It has reaired on Syfy.

第二次世界大战的意大利战场上，一支美军巡逻队在森林中发现了一架失事的太空船，并且他们还遇到了外星人。在附近的纳粹德军也发现了外星人的踪迹，同时也派出了巡逻队想抢在美军之前捕获外星人···
最经典的镜头是其中一个美国兵问其中一个外星人：你们星球上有没有金发美女？结果外星人指着另外一个毛茸茸的外星人回答：她就是！
还有一幕：
那群美军被俘获时注射了麻药，一个美军在迷迷忽忽是打了一个穿军大衣的矮子，结果那个矮子是来看外星人的希特勒！！
哈哈，80后成长与90年代译制片时期的童鞋应该都有印象的

Simon Banks and his son Daryl disappear from an anti-drug conference in Peru. Blair insists on going with Jim to rescue the Captain and his son, even if it means he has to jump out of an airplane and face drug runners.