Kieran Culkin says Sarah Snook believed Succession was getting a fifth season "until the very end"
According to Kieran Culkin, Succession creator Jesse Armstrong pitched countless new plots to keep the actors guessing as to where the series would land

Any and all viewers who didn’t once feel abreast of Succession’s next moves during its fourth and final season, rest assured: Kieran Culkin was just like you once. In a new conversation with Claire Danes for Variety’s “Actors on Actors” series, Culkin explains that Succession showrunner Jesse Armstrong kept the entire cast guessing about where the show might head next by throwing out multiple ideas for different seasons as red herrings.
“He told me before the season started that he thinks this is the end, but he doesn’t know. I’d actually stopped asking what was coming later. And that was the thing: I liked it. I liked not knowing!” Culkin recalls. “Then this year, he mentioned that it might be the end before we started shooting, so I started asking him questions. He told me what happens with Logan, and I asked him to break down everything. And he explained the entire season to me. And then when he got to the end, I said, “Well, that seems like that’s the end of the show.” And he goes, ‘Yeah, it does, doesn’t it? Although …’ And then he just started talking about all these different ideas off the top of his head.”