Sandy's mysterious illness, which may or may not be syphilis, continues to be a source of speculation and gossip among viewers of Succession. Sandy's deteriorating condition, including mobility and speech issues, indicates the possibility of advanced stages of syphilis, known as tertiary syphilis, which affects the organs and brain. The introduction of Sandy's daughter, Sandi, as a shrewd and calculating operator, highlights the power dynamics within the Roy family and set up an intriguing storyline for Succession Season 4.

Many viewers were left wondering what happened to Sandy in Succession after the once-formidable foe to the Roy family was sidelined by an illness. Season 3 of Succession reintroduced Sandy Furness (Larry Pine) in poor health amidst a tense shareholders meeting, but despite rumors of syphilis, the actual medical condition of Logan Roy's arch-rival is still a mystery. It's possible that Sandy did contract the sexually transmitted disease, but that seems like just...