Warning: Spoilers ahead for HIMYF episode 5!
Sid’s traumatizing backstory in How I Met Your Father episode 5 is a clever call back to an unanswered Lily Aldrin mystery from HIMYM. How I Met Your Mother left several mysteries at the end of its 9-season show, which gives How I Met Your Father the advantage of finally being able to give more clues to them or connecting back to those frustrating plot points. Although Lily’s mystery is referenced indirectly in the episode, she’s already been explicitly included in a major connection to How I Met Your Father’s series, as she and Marshall sold the old apartment to Sid and Jesse.
When Sophie’s mom Lori (Paget Brewster) appears in How I Met Your Father episode 5, Sid (Suraj Sharma) is reminded of a particularly traumatizing moment from his youth. When Sid was preparing to masturbate in his room, he brought home a poster featuring Sophie’s mom. Sid’s mom began knocking on the door, leading him to quickly get up in a panic where he knocked over his lava lamp. As the lava lamp fell, it broke directly on top of the cage of his hamster, Slim Shady, and instantly killed his pet. In one of his most shameful memories, Sid explained that he still finished the task after burying his hamster that day.
Related: How I Met Your Father Introduces Its First Barney-Like Catchphrase
Sid’s tragic backstory of killing his hamster connects back to one of How I Met Your Mother’s biggest unanswered questions about Lily Aldrin (Alyson Hannigan), which deals with the mystery of her class’s pet guinea pig, Mr. Buttons. In How I Met Your Mother season 6, Barney blackmails Lily into not saying anything around Nora by bringing up her class guinea pig Mr. Buttons, which instantly gets her to agree. Later that
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