The emotional core of the episode is the revelation of past, which explains his chronic memory loss.
After his daughter's death and his wife's departure, a Time Wizard wiped Morlock's memories so he would forget the trauma of his failures. Benriya Saitou-san, Isekai ni Iku Episode 6
This article covers the major plot points and character revelations from ( Benriya Saitou-san, Isekai ni Iku ) Episode 6, titled "Memories of an Old Sorcerer." The Battle Against the Dark Spirit The emotional core of the episode is the