To explain the title of this post, I must digress for a minute:
Back in the late '60s and early '70s when Star Trek: The Original Series was still on the air and still just called Star Trek, Mom and Dad would watch it occasionally. But for a while, it seemed that every other time they watched it, it was the "Who Mourns For Adonis" episode. So, they use the phrase to refer to the particular episode, of any TV series, that seems to get rerun most often.
And for "Lilo & Stitch: The Series", that episode is "Splodeyhead". That's the one where Lilo, Stitch, Jumba, Pleakley, Gantu and 625 are trapped on Niihau, the Forbidden Island, under a rock outcropping, above which an experiment, #619, keeps shooting blobs of explosive plasma at them whenever they try to come out (so Lilo names the experiment "Splodeyhead").
So Mom and I had this conversation:
Me: "Which episode is on today?"
Mom: "Hmm... Splodeyhead again. It's 'Who Mourns For Adonis'."
Me: "Who Mourns For Splodeyhead!"
And while we're on the subject...