Details of Logan’s death were a closely guarded secret, with Cox saying he played a part by showing up on set to “film” scenes he didn’t need to be in.
Cox said he went “of (his) own will” so members of the paparazzi attending the shoot wouldn’t get suspicious.
In the BBC interview, he also told Rajan that he thinks Logan is still alive.
“I still believe this, maybe Logan isn’t dead. This could be part of an elaborate ruse to find out,” he said.
‘fake his death’
“If you think about it, from Logan’s point of view, he has to figure out how his kids are going to act when he dies, what’s going to happen?
“The only way to do that is to fake his death and actually, at some point in the distance, he’s observing the chaos that ensues.”
But he added that the character wouldn’t “come back from the dead,” saying, “I’m just saying that could be an assumption.”
During the interview, Cox also reflected on his childhood, his career, his thoughts on Scottish independence and why he supports the Hollywood writers’ strike.
The full interview, Brian Cox: Amol Rajan Interviews, can be seen on BBC Two on Thursday 25 May at 7pm and on BBC iPlayer.