series that illustrates that "emotional complexity" lies "beneath Adventure Times weirdness". Controversy "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, one of the show's production companies, 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 later wrote an article about how the episode "handled female desire—female queer desire at that—in a subtle but complex way", and 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 [because] 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 areas that discourage homosexual relationships, the show has not been able to officially clarify the relationship in the series itself. In the finale of Adventure Time, "Come Along with Me"which aired on September 3, 2018the relationship was officially confirmed when Marceline and Princess Bubblegum shared a kiss. Media release The episode was first physically released as part of the 2013 Fionna & Cake DVD, which included 16 episodes from the series' second, third, and fourth seasons. It was later re-released as part of the complete third season DVD in February 2014. In addition, the 2015 limited edition 12" vinyl record release Marceline the Vampire Queen Rock the Nightosphere included "I'm Just Your Problem" alongside other songs sung by Marceline. See