Gintama Gintama' Episode 31 The People You Tend to Forget Tend to Show Up After You Forget Them ( Air Date 2011-10-31 ) Genre Action & Adventure, Animation, Comedy, Sci-Fi & Fantasy category. Overview "Katsura visit Yorozuya with a Elizabeth's placard to solve the mystery of Elizabeth's disappearance. But the investigation only reveals a shocking truth.".