少了什么

〈少了什么〉（"What Was Missing"）是《探险活宝》第三季的第10集。在卡通频道2011年9月26日播出。本集以阿宝和老皮为主角。在这一集里，阿宝、老皮、泡泡糖公主和艾薇尔组乐团来打败门神，并拿回他偷走的东西。
剧情.
老皮和哔莫给阿宝与在第二季《公主的头发》一些绺泡泡糖的头发“独处时间”。突然间门神出现并夺走锁、老皮的毯子和哔莫的控制器。阿宝和老皮追逐祂进入各种门，碰见泡泡糖公主和艾薇尔，她们似乎都是门主盗窃的受害者。最后门神跳过一个门，但一群人无法过去。他们发现他们必须唱一首歌才能进门，故决定组乐团。杰克得到他的中提琴，艾薇尔取回她的贝斯。泡泡糖公主使用哔莫演奏芯片音乐，阿宝节奏口技。
然而，乐团成员之间相当紧绷，之后爆发。艾薇尔就唱了一首〈我只是你的问题〉（I'm Just Your Problem) ，表达她和泡泡糖陌生关系哀叹的歌曲，且打开一些，就因为它是一首出自事实的歌曲。艾薇尔和泡泡糖开始争吵，然后老皮参一脚，之后解散了乐团。阿宝就对他朋友感到震惊，就唱“世上最好朋友”且哀叹他朋友正在奋斗。泡泡糖、艾薇尔和老皮加入，四人都能打开门。阿宝、老皮、哔莫在门里面重获他们的物品，还发现一件黑T恤，他们误认为是艾薇尔的，其实这件是过去艾薇尔给泡泡糖的礼物。艾薇尔尴尬地从门神的住所追阿宝、老皮和泡泡糖。
幕后制作.
《少了什么》是芮贝卡·薛格和亚当·穆托按照马克·班克、派屈克·麦克海尔、奥斯本和原创潘得顿·沃德所制之故事原稿撰写剧本及制作分镜。指导。薛格和穆托《少了什么》的第二集处理艾薇尔，因此薛格后来在Tumblr上指出两者“想要做好”。薛格后来解释“此集是关于友谊，但是我希望是关于诚实！艾薇尔几乎可打开门，因为她卸下心防，并且在唱这首歌时刹那间说出实情。”她后来将此集的主题比作鲍勃·福斯的一句话：“唱歌的时候是当你的情感层面太高而不能说”，认为她“真的想尝试这种感觉”。此集的原标题是《Door Jam》，但后来有所更改，因为据穆托说要避免双关语的标题。
此集所有歌曲皆由薛格作曲，她的官方Tumblr上发布〈我只是你的问题〉的演示版。她的父亲罗伯（Rob）后来在YouTube上发布〈我只是你的问题〉和〈我世界上最好的朋友〉的演示版。〈我只是你的问题〉事实是为此集写的最后一首; 薛格坚持到最后一刻，她的情绪疲惫影响到歌曲写作。这首歌源自于薛格与前室友的经历。虽然经常吵架，尽管不是特别喜欢，她绝望彼此之间成为朋友。薛格将此情境用在艾薇尔，写这首歌，以便艾薇尔与泡泡糖公主有争执时想成为她的朋友。〈我世界上最好的朋友〉是薛格为友谊庆祝而写的，她分享给她的同事，特别是她制作分镜伙伴穆托。沃德后来在评论音轨上承认《少了什么》，当他正在编辑此集动态剧本，开始哭泣，因此集的歌曲充满了情感。《探险活宝》作曲蒂姆·基弗（Tim Kiefer）在此集演奏乐器。为了补足贝斯和中提琴的音调，他用Game Boy回路创造了打击乐的声音，然后使用一个自动配和音“泡泡糖公主的旋律”让“漂亮的旋律声音伴随著哔莫的刚性、机器人的模式、回路和结构”。
争议.
"What Was Missing" became controversial because of an allegedly implied past relationship between Marceline and Princess Bubblegum. The controversy largely began after an accompanying "Mathematical" recap—a behind the scenes video series produced by Frederator Studios that implied that there were lesbian relations between Princess Bubblegum and Marceline and that the writing staff actively seeks input from fans. This incident was addressed by Fred Seibert, the show's executive producer, who said that "in trying to get the show’s audience involved we got wrapped up by both fan conjecture and spicy fanart and went a little too far." Soon after, the video recap and the entire channel was pulled off of YouTube, although "What Was Missing" still airs during reruns. Seibert's decision to remove the video also proved controversial; "Bitch" magazine later wrote an article about how the episode "handled female desire—female queer desire at that—in a subtle but complex way", but that the removal of the recap and the studio's perceived treatment of the controversy was detrimental towards the acceptance of queer romance in children's television. Ward later addressed the issue and gave a more neutral view, saying that, because there were "so many extreme positions taken on it all over the Internet", he did not "really want to comment on it it was a big hullaballoo."
In August 2014, Marceline's voice actress Olivia Olson told a crowd of fans gathered at a Barnes & Noble book signing from "The Adventure Time Encyclopedia", that, according to Ward, Marceline and Princess Bubblegum had dated in the past, but that because the series airs in some areas where homosexual relationships are illegal, the show has not been able to officially make clear the relationship in the series itself. However, Olson had posted a note on her Twitter account, saying that fans had taken her comment more seriously than she intended and that she was merely joking. The tweet has been deleted shortly after.