This episode does kind of feel like it’s stealing the wish dimension idea from Buffy. Even Hook seems like he has taken on some Spike-esque mannerisms.
Two other people brought this up but the plot of a son being stolen and raised in a hellish dimension by a black hat person only to come home and exact revenge on his father…is literally the plot of S3-4 of Angel.
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"He was a lot of things to me" "The only conclusion was love"