SPOILER ALERT:This article contains details of Sundays episode ofSuccession.
So stop right now if you dont want to know what went down.
Todays the day, says Logan Roy in tonights truly shocking and yet so-expected episode ofSuccession.

Brian Cox as Logan Roy on ‘Succession’HBO
That refocus by the self-professed corporate pirate takes a very different turn when Logan drops dead on the plane.
I think that they will get locked out.
Tonight, in what has proventhe most successful season ofSuccessionso far, the lion in winter roars no more.

(L-R)Nicholas Braun, Sarah Snook, Kieran Culkin, Alan Ruck, Jeremy Strong, Brian Cox, Matthew Macfadyen and Jesse Armstrong attend the ‘Succession’ Season 4 premiere in New York City last monthDimitrios Kambouris/WireImage/Getty Images
Lets grieve and whatever, Kendall tells his siblings in one of thoseSuccessionlines of brevity that says almost everything.
DEADLINE:So, Logan Roy is dead.
How did you find out it was going to finally happen?
And I knew that I was going to be going.
Im very proud of myself, that I managed to keep this secret.
Its such a big secret.
DEADLINE:Where do things go from here in the final episodes with the Big Bad Papa gone?
DEADLINE:Entirely out of it?
COX:(laughs) I mean, I did actually turn up for the funeral.
And I said, I do.
And they said, what?
I said, Im coming in.
They said, yeah, but were not doing the scene.
I am coming in.
So, I said to my driver, I said, Joe, lets go, were going.
And I was the one who took that responsibility.
They didnt even think of it.
COX:Well, yeah, I suppose it is.
I never thought about it that way.
Yeah, so, I was still in character.
DEADLINE: In that vein, what are your thoughts on Succession now and the end?
Also, you know, I think Jesse was at a point where he was done.
You know, also, I think Jesse needs to move on to other stuff.
You know, hes been writing this show for six years, so…
DEADLINE:So, no spinoffs?
COX:I dont think so.
I dont think therell be a spinoff, no.
I think that would be just same-old, same-old.
I think weve covered it.
I dont think there are any spinoffs, really.
I think its unnecessary.
You know, and Jesse, hes not going to do a spinoff.
He wants to move on.
He wants to go into other territories, you know?
DEADLINE:Such as?
COX:Well, the problem is, politically what is happening now.
Its, even more exasperating now, whats happening in the UK and whats happening here.
Where do I want to go next?
What do I want to explore?
Maybe I want to look at something else back home in the UK, he may ask himself.
Do you know what I mean?
Its the writers imperative that needs to move into another area, you know?
DEADLINE:Staying in the area ofSuccession, who do you think ends up ruling the empire?
Ive got enough to be getting on with.
My suspicion is that it wont be the kids.
I think that they will get locked out.
Ultimately, theyll get locked out.
It was the last big mistake and I could see them walking into a shitstorm.
And I think theyre going to be walking into more shitstorms.
So, Im not sure if theyre going to be coming out running it.
Or, the other alternative is, where does Tom and Greg go to, you know?
Where do they go to?
What does Tom go to, with, in his extremely dysfunctional relationship with his wife?
They played it beautifully.
That tragedy is still to be resolved in some way, you know?
So, I dont know who will end up running the empire.
Its hard to tell unless another agent comes in, but I doubt it.
I doubt Jesses going to introduce anybody else at this point.
So, when it was pitched to me because my manager said, I think its a one-season part.
And there was a pause.
COX:He knew he had to bring it to a close, you know?
He knew he had to bring it to a close.
It was difficult for him to bring it to a close.
Then, because of the other writers, it sort of went on this different route.
Was this the right way, the right time to kill him off?
DEADLINE:I always expected him to just die one episode, out of nowhere.
like what ended up happening in this episode on the plane.
DEADLINE:The tension?
COX:The tension between the father and the children.
If you think about it, the fourth season is where it is done.
Each season centered on one of the children.
Season 1 dealt with Kendall.
DEADLINE:Lets talk death…
COX:Lets…
But what was it like shooting the death scene, with you on the floor in the plane?
COX:I was never there.
I wasnt there at all.
COX:They decided, well, they didnt want to do that.
I mean, they had this idea, you know, I think its a phone and an ear.
I think thats all you see, isnt it?
DEADLINE:Well, you see a bit of a nose and a chin, that kind of thing.
You know, its an out-of-focus body, people in the fore.
So, what was the last Logan Roy scene that you shot?
COX:You hit it in one, thats the one.
Thats what it is.
COX:Yeah, thats the root.
And hes got that line because he knows it, and Logan is serious.
Hes always been serious.
You know, because I think hes tragic.
Because I think its such a bad script, the Donald Trump script.
But then I look at Donald Trump, and I think, God, hes so lost.
Hes really an abused child, Donald Trump.