Uniforms and insignia of the Schutzstaffel shoulderboards on both sides. In March 1936, the camp "service" was formally established as the third branch of the SS, the "Totenkopfverbände" or skull units. At about this same time, for similar reasons, the military SS formations (the "Leibstandarte SS Adolf Hitler" and the "SS-Verfügungstruppe") adopted a service uniform in what was termed "earth-grey" ("erdgrau"). This also was based on the black uniform, but without the red "Hakenkreuz" armband, its place on the left sleeve being taken by an eagle-and-swastika patch, and worn with trousers and shoes or calf-high jackboots. In June 1938 this uniform was authorized for full-time "Allgemeine-SS"
What Was Missing seen by 0.4 percent of all households aged 18 to 49 years old were watching television at the time of the episodes' airing. Tyler Foster of DVD Talk called the episode a "highlight" of the "Fionna & Cake" DVD. Specifically, he praised the song "I'm Just Your Problem", calling it both a "fan favorite" and "significant as the moment I decided I was a fan". Dana Piccoli of AfterEllen.com enjoyed the way the episode "alluded to perhaps, more than platonic feelings between" Princess Bubblegum and Marceline, as well as the fact that "What Was Missing" was underlined by potential lesbian