Since “Euphoria” aired its second season in 2022, loss has enveloped the cast and crew of the HBO series, with the deaths of Angus Cloud and executive producer Kevin Turen in 2023 as well as Eric Dane just earlier this year. It was the death of Cloud, who died from an accidental overdose involving fentanyl, that creator Sam Levinson worked through as he prepared to take “Euphoria” into its next ch...