Jeremy Clarkson, the British television personality best known for hosting the relaunched BBC series “Top Gear,” disclosed Wednesday that he has been diagnosed with an aggressive form of prostate cancer, delivering the news to viewers in the final episodes of the fifth season of his Amazon Prime Video series “Clarkson’s Farm.”

In the emotional scenes, the 66-year-old told farm manager Kaleb Cooper and land agent Charlie Ireland the news during a conversation about harvest planning.

“I’ve got cancer,” Mr. Clarkson said. A visibly stunned Mr. Cooper replied, “No, you haven’t. Where?” Mr. Clarkson answered, “Where it is is of no concern of anybody. I’ve known since May.”

Mr. Clarkson told his co-stars that he had slipped away previously to undergo a biopsy, and that while the cancer was described as aggressive, it had been caught at an early stage.

“It’s really early,” he said, adding that he would need an operation and would be “out of action for a little while” during recovery.

Later in the episode, Mr. Clarkson disclosed the specific diagnosis.

“The prostate, 10% of it’s dead, the 10% where the cancer is,” he said, according to ITV News.

The season finale showed Mr. Clarkson speaking from a hospital bed, where he acknowledged that some of his treatment had not gone as planned.

“We started season five with me in a hospital bed and here we are at the end of Season 5 and I’m back in a hospital bed,” he said.

He left the door open on the show’s future. “What I wanted to say was if this is all successful, I’ll see you for Season 6, and if it isn’t, I won’t,” he told viewers, ending the episode with the words, “Take care, everyone.”

Prior to the episodes’ release, Mr. Clarkson posted a video on Instagram warning fans that the new installments were “a difficult watch” and “really, really difficult.”