电视台之间的竞争胜局已定，火星台两个受欢迎节目《巴太与李》和《开心字典》以百分之百的收视率击败地球台，火星台节目主持人兼老板巴太也气焰高涨，除了对自己属下员工苛刻之外，巴太更想吞并地球台。正所谓有人欢喜有人愁。地球台李老板竟要跳楼造新闻，增加收视，幸好女儿李小美及时赶到令李老板回心转意。这时巴太来电冷嘲热讽，李老板受不住刺激导致血管爆裂入院，他嘱咐女儿一定要让地球台摆脱困境。

第三季《笑星撞地球》全新加入“年代秀”元素，每一期节目里演员们将以年代为标准分成两个竞演队，在两位主持人领队的带领下精彩演绎其所属年代的经典作品，使节目在欢乐之余多了一份浓浓的怀旧情结，以满足不同年龄层观众的欣赏口味。

《笑星救地球》（The Funny Half Show）是香港无线电视在1990年至1991年制作的搞笑节目，第一辑在1990年1月6日起逢星期六晚上8点35分于无线电视翡翠台播映，总共13集。由当时的“扮嘢全能”廖伟雄与胡大为主持，其他演员包括黄一飞及貌似儿童但实际已成年的黄一山（细龟）等，节目内容以惹笑及讽刺时弊为主，播出时曾经大受欢迎。翡翠台曾于2005年重播该节目。

A group of aliens has come to Earth to learn about its population, customs, etc. To avoid detection, they have taken on human form which gives them human emotions, physical needs etc. WITHOUT the understanding of what they mean or the inhibitions normally present in humans. Their leader takes the position of a college professor, their military expert as his sister, their intelligence expert, supposedly oldest of group takes form of his teenage son. The uninhibited reactions turn everyday events into unusual situations.

A group of aliens has come to Earth to learn about its population, customs, etc. To avoid detection, they have taken on human form which gives them human emotions, physical needs etc. WITHOUT the understanding of what they mean or the inhibitions normally present in humans. Their leader takes the position of a college professor, their military expert as his sister, their intelligence expert, supposedly oldest of group takes form of his teenage son. The uninhibited reactions turn everyday events into unusual situations.

A group of aliens has come to Earth to learn about its population, customs, etc. To avoid detection, they have taken on human form which gives them human emotions, physical needs etc. WITHOUT the understanding of what they mean or the inhibitions normally present in humans. Their leader takes the position of a college professor, their military expert as his sister, their intelligence expert, supposedly oldest of group takes form of his teenage son. The uninhibited reactions turn everyday events into unusual situations.

A group of aliens has come to Earth to learn about its population, customs, etc. To avoid detection, they have taken on human form which gives them human emotions, physical needs etc. WITHOUT the understanding of what they mean or the inhibitions normally present in humans. Their leader takes the position of a college professor, their military expert as his sister, their intelligence expert, supposedly oldest of group takes form of his teenage son. The uninhibited reactions turn everyday events into unusual situations.

A group of aliens has come to Earth to learn about its population, customs, etc. To avoid detection, they have taken on human form which gives them human emotions, physical needs etc. WITHOUT the understanding of what they mean or the inhibitions normally present in humans. Their leader takes the position of a college professor, their military expert as his sister, their intelligence expert, supposedly oldest of group takes form of his teenage son. The uninhibited reactions turn everyday events into unusual situations.

四个外星人来到了地球，化身为所罗门一家研究人类的文化。迪克，作为总指挥官的他，扮演了中年父亲的角色，并做了大学的物理教授。莎莉，副指挥官，武器专家，身份是迪克的妹妹。汤米，信息官，真实年龄比迪克大得多，却扮成迪克的儿子，通过在学校受教育来搜集人类的各种资料。哈里，身份是迪克的弟弟，其实是小团队联系总部的工具，功能类似于电话。　　别以为有外星人就是科幻片，人家来地球纯粹是为了体验做人到底是啥感觉的。神刀刀的教授；人高马大，自认为绝色的教授妹妹；处于青春期，色得可爱的教授儿子；傻得很有水平，从来睁不开眼的教授弟弟。“歪星人”妙趣横生的地球之旅，带给我们的是欢笑以及对人性的思考。

《笑星闯地球》是一档原创喜剧节目。节目中大张伟和王自健将分别带领笑星队和地球队，针对节目中出现的话题分为正反两方进行辩论，以双方队员演的小品来证明己方观点。