Titans season 4 spoilers follow.

Titans has delivered a hugely shocking twist in its season 4 premiere.

No sooner had Lex Luthor (Titus Welliver) entered the fray did he exit in dramatic fashion, being surprisingly killed off while meeting with son Conner Kent (Joshua Orpin).

In the newly-released premiere, the supervillain suddenly started to spit up blood before dying, and showrunner Greg Walker has admitted that even he is "disappointed" by the all-too-brief appearance.

titus welliver, anna diop, titans, season 4
Warner Bros.

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"If you wanted more Titus, you should be really disappointed. I’m disappointed," he told TVLine. "But we knew we had those constraints, and we worked with them."

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His words suggest that they were only allowed limited use of Luthor by DC. Walker added that bigger characters tend "to gobble up a lot of Titans stories".

"Not that they would have given us more than one episode [of Lex], but we also wanted to focus on the Titans," he continued. “And as you will see, this season really focuses on the Titans and their relationships with each other."

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Actor Welliver called his small appearance "bittersweet", though praised the storyline as "so well realized that it wasn’t one of those things where I stepped away from it and went, ‘Man, there was so much that I could do, that we could do.'"

He continued: "Anybody who knows that world, and knows Lex Luthor, knows that the guy’s got probably clones stashed in his basement! We know that from reading the comics. We’ve thought that Lex Luthor has been killed and, ‘Oh, no — that was a clone.'"

The star added that the storyline "was to really propel Connor/Superboy’s story into the forefront of things, and give the fans of the show something to really bite into, to have a sense of where that character is going."

Titans sirs on HBO Max in the US. Netflix carries the show in the UK.

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Sam is a freelance reporter and sub-editor who has a particular interest in movies, TV and music. After completing a journalism Masters at City University, London, Sam joined Digital Spy as a reporter, and has also freelanced for publications such as NME and Screen International.  Sam, who also has a degree in Film, can wax lyrical about everything from Lord of the Rings to Love Is Blind, and is equally in his element crossing every 't' and dotting every 'i' as a sub-editor.