彩虹姊姊的大秘密

〈彩虹姊姊的大秘密〉（"Lady & Peebles"）是《探险活宝》第四季的第19集。在卡通频道2012年8月20日播出。本集以阿宝和老皮为主角。在这一集里，泡泡糖公主和彩虹姊姊寻找阿宝和老皮，与冰霸王的战斗后已经失踪三周。之后有缘相见冰霸王的心脏寒黑心，他绑架他们并希望娶泡泡糖。泡泡糖最终以肉搏战击败寒黑心。
Sugar felt that Bubblegum, in the episode, was the victim of sexual harassment by Ricardio, and that the only way for her to solve the problem was for her to turn the situation around. In the episode, this was metaphorically depicted by having Bubblegum best Ricardio in combat. Sugar reveled in the fact that she got to draw Bubblegum ripping off Ricardio's leg and beating him with; she noted that she had been wanting to featuring such a scene in her art since she was in high school. The climactic scene with Ricardio was also supposed to have featured more body imagery. Ricardio was originally slated to have been seated on a giant hand-throne, and the hole in the Ice King's chest was to have been more graphic.
Several video games inspired elements of the episode. Ricardio's bioengineered body was based on the finale incarnation of Majora, a character from the eponymous 2000 video game '. The general look of Ricardio's dungeon was inspired by the 2002 video games ' and the 2010 game "". Robert Ryan Cory, a character designer most known for his work on the Nickelodeon series "SpongeBob Squarepants", storyboarded the panels featuring Princess Bubblegum stomping on Ricardio and grinding her foot into his face. Because he drew the panels, lead character designer Andy Ristaino also allowed Cory to finalize the character designs for the scene. He later posted them on his official Flickr account.
Reception.
"Lady & Peebles" first aired on Cartoon Network on August 8, 2012. The episode was viewed by 2.754 million viewers and scored a 0.5 Nielsen rating in the 18–49 year old demographic. Nielsen ratings are audience measurement systems that determine the audience size and composition of television programming in the United States, which means that the episode was seen by 0.5 percent of all households aged 18 to 49 years old were watching television at the time of the episode's airing. The episode first saw physical release as part of the 2013 "Fionna and Cake" DVD, which included 16 episodes from the series' first three seasons.
Critical reception to the episode was largely positive. Sava awarded the episode a "B+", and wrote that Ricardio is "always welcome on this series, largely due to Takei’s delightful voice work." Furthermore, he praised the way that Takei delivered his lines, noting that "there’s a theatrical smarminess to his vocals that is a stark contrast to the Ice King’s nasality", and that "Takei always sounds like he’s having a great time reading the ridiculous lines that are written for him." Sava also wrote positively of Bubblegum's character, noting that she "dominates this episode" and that the "episode reveals a side of her that we rarely see, and hopefully we’ll get more of badass PB in the future."
Richard Whittaker of "The Austin Chronicle" noted that the episode is "Princess Bubblegum-centric" and, along with the third season episode "Fionna and Cake", gives the female fans of the show their own Finn and Jake moments. The "Entertainment Examiner" named the episode as one of the "memorable" episodes that appeared on the 2013 DVD release "Fionna and Cake". The episode was nominated for an Annie Award for "Storyboarding in an Animated Television/Broadcast Production" at the 40th Annie Awards, although the episode did not win.