The first Cylon war has been raging for 10 years and a young Ensign William Adama joins the fleet. Disappointed not to be assigned to a fighter but to a freighter, his co-pilot also isn't too keen on having a rookie flying his aircraft as he has only a short time before he again becomes a civilian. Their cargo is a civilian scientist, but they no sooner leave than she has new orders for them and a new destination. Although she’s less than forthcoming about the details, Adama is keen—particularly as it involves going into Cylon controlled space. However, nothing is as it seems.

As season 4 begins, the last remnants of humanity continue their search for a new home. Galactica’s crew attempts to make sense of the inexplicable while four members of the fleet are still reeling from past revelations.

A two-hour Battlestar Galactica special that tells the story of the Battlestar Pegasus several months prior to it finding the Galactica.

Battlestar Galactica 是随七十年代星球大战的电影热潮而制成的科幻电视剧，虽然其曾经制作过电影版本，但最后因为粗制滥造而导致整个系列失败收场。经过三十年后的今天，Battlestar Galactica 已算是一套经典的科幻影片，故于 2003 年由美国的科幻电视台 SCI FI Channel 拍板重新制作长达三小时的迷你电视剧，相较起旧有版本，这次已引入很多先进的计算机技术，务求令观众耳目一新。 基本上，新旧版本的剧本变化不大，有所分别的则是剧中的数个人物转了性别；此外，所有的机械设定，例如人类所用的战机、战舰，又或是机械人 Cylons 的设计已经经过现代化，不会有追不上潮流的感觉。而这次的新版本因为得到众多观众好评，故 SCI FI Channel 在近期宣布重拍这套电视剧，希望能够继续延续这个科幻经典传奇。 故事背景于未来世界，人类已由地球移民到其它星系居住；人们为了贪求私欲，便开始研究及制造一种拥有独立思想及感觉的机械人 - Cylons 来为人类服务。但人们怎样也想不到，这些本应是帮助人类的机械人竟会调 转头对抗自已，因此，人类与自已制造的机械人之战争便开始展开... 在经过数十年漫长、死伤无数的战争结朿后，人们本以为可得到和平的生活，但 Cylons 明白到即使在休战后始终没辨法与人类建立实际的外交关系，故 Cylons 开始密?#092;另一个对付人类的计划，这次它们将会制造一些与人类一模一样的机械人作间碟渗入人类世界，从而以里应外合的方法把人类消灭。