蛋蛋被许愿草实现了和爸爸互换了身份的愿望。突然的变化，让二人搞砸所有事情并气走了妈妈。经过努力，蛋蛋明白了学习的目的并取得了好成绩，而父母也学会了尊重和信任自己的孩子。

1998年，来自西安交大的“少年班”导师周知庸（孙红雷 饰），前往全国各处寻找智商超群的天才少年，最终被选出的22个少年将被赋予艰巨的使命。少年吴未（董子健 饰）就是其中的一员，在这个特殊的班级里，他先后认识了有暴力倾向的麦克（王栎鑫 饰）、小天才方厚正（李佳奇 饰）、“神棍”王大法（柳希龙 饰），以及聪明却冷若冰霜的周兰（周冬雨 饰），五位天才少年从此开始了早于同龄人的大学生活，同时还面对着青春期的各种“疑难杂症”。女神江依琳（夏天 饰）的出现扰乱了男生们的心，攻克“世界数学大赛”的压力也从天而降，而导师周知庸也面对着人生中的最大难题，“少年班”该何去何从？天才少年人生的征途才刚刚开始……

唐僧（薛梅康 饰）想要只身一人下山化缘，遭到了孙悟空（吴文超 饰）的阻拦。然而，唐僧却并没有听徒弟的警告，一意孤行，结果在化缘途中遇见了居住在盘丝洞里的蜘蛛精（殷明珠 饰）。蜘蛛精将唐僧捉住盘丝洞，想要献给大王，孙悟空久久不见师父归来，出发寻找。猪八戒亦邂逅了盘丝洞里的众美艳女妖，受到了女妖们的魅惑，鬼迷心窍的猪八戒放松了警惕，结果也被妖怪们抓获。孙悟空来到盘丝洞和众妖们展开了激烈的战斗，然寡不敌众，在这一紧要关头，观世音菩萨现身，教给了孙悟空一套降妖除魔之术。重装上阵的孙悟空再战群妖，并且最终获得了胜利。

In court for murder, Professor Moriarty is released seconds before Holmes arrives, too late, with vital evidence. Free again Moriarty vows to Holmes that his next crime will be so fiendish and amazing that Holmes's reputation will be finished. Moriarty sets about a fiendish plot involving the crown jewels and a series of mysteries to distract Holmes's mind.I enjoy most of this series as they all seem to run to the same formula. Here the plot goes back to basics and adds more of the mystery and less of the comedy. The plot is an enjoyable battle of wits between the two great minds. The downside is that the side-mystery that Moriarty sets up takes up the majority of the time and the two don't cross swords as well as they do in a gentlemanly beginning. The mystery surrounding Miss Brandon works OK but not really great as you know the whole time who is behind it and why. The jump to the crown jewels is too easily made and is a bit of a letdown.The comedy is less evident than usual but is still there. However it is overwhelmed by the more serious side. Bruce still does well but I was glad that he stood up to Holmes more than usual – telling him off for treating him like a child and such like. Rathbone is a good Holmes but his logic was off here and I wasn't as impressed by him as I usually am. Zucco is an interesting foil, but doesn't get enough time to work here. Lupino in an early role is interesting but a little too heavy and tads to overplay her tension a bit.Overall this is an OK addition to the series. The plot is reasonable but focuses too much on the diversion than the central characters and the reduction in comedy makes it feel a lot heavier than usual.