Don Lemon has claimed he cannot say why Elon Musk canceled his new show on X, in an interview with old employer CNN for the first time since being fired.

Sitting down with OutFront's Erin Burnett on Wednesday, Lemon, 58, fielded questions about the show's abrupt nixing - which came after just one unaired episode.

The anchor's old network even produced never-before-seen clips from the called-off program, where a visibly irritated Musk, 52, batted back questions about free speech and white nationalist conspiracy theories prevalent on the platform.

The short-lived series, called 'The Don Lemon Show', was scrapped shortly thereafter, leaving Lemon without a platform again.

While Lemon claims he is clueless over why Musk became 'so upset' by the interview, the billionaire countered that he canned the show after finding Lemon's approach was 'basically just CNN, but on social media.'

'And, instead of it being the real Don Lemon, it was really just Jeff Zucker talking through Don, so lacked authenticity,' he said on X.