That actually kinda sparks a dim memory. I may have seen that when it first ran. I'd have been 12 at the time.According to IMDb, William Smithers has the distinction of having been the top-billed guest on an episode of Hawaii 5-O that only aired once, on January 7, 1970. The plot of "Bored, She Hung Herself" dealt with a yoga technique that induced auto-asphyxiation via hanging...which reportedly was fatally imitated by a viewer and resulted in CBS being sued. The episode was never rerun in either the original run of the series or syndication, and has never been released on home video or streaming services. CBS All Access doesn't even account for it in its Season 2 numbering scheme.