The former child star said he was fooled by the details

Christopher Knight he says he was tricked into working with a real spider in his time The Brady Bunch days.

On Thursday, Nov. 7, the former child star, 67, appeared on NBC Today with his The Brady Bunch costars Barry Williams and Eve Plumb — who played his brothers Greg Brady and Jan Brady, respectively — and discussed some nostalgic moments from the sitcom.

One memory Knight can’t forget comes from a Season 4 episode filmed in Hawaii called “Pass the Tabu.”

Related: ‘Brady Bunch’ Cast: Where Are They Now?

The scene called for Knight’s character, middle son Peter Brady, to wake up in his bed with a tarantula crawling up his body. However, the actor says he was fooled by the details.

“They lied to me. They told me they put ball bearings on the prongs so they couldn’t inject (anything),” he said. Today host Hoda Kotb and Carson Daly of what the producers told him at the time.

Knight continued: “I was terrified, but I was the perfect kind of terrified because I got to prove to the ladies that I was my hero. I shouldn’t tell them I’m scared to death.”

Williams, 70, vividly recalled the scene, adding: “And this was a real spider and it had nothing under it, it was on it. And then I went in and had to figure out how to get it off him.”

While Williams played the oldest Brady brother on camera, he channeled the role in real life when it came to safely removing the creepy crawler from Knight.

“I had a tarantula as a pet and I didn’t want it to get hurt, so I was able to pick it up and let it land,” he said.

Related: 10 Fun Facts About The Brady Bunch House That Might Surprise You

Meanwhile, Plumb, 66, recalled that the Brady girls had their own special pet on set – although Fluffy the cat “just disappeared” after the sitcom’s pilot episode.

“That’s the TV,” she added. “Things come and go.”

Adding to her point, Knight recalled that Fluffy’s replacement, The Tiger Doghe also disappeared from the show without any explanation after season two.

Never miss a story – sign up PEOPLE’s free daily newsletter to keep up with everything PEOPLE has to offer, from celebrity news to compelling human interest stories.

“Watching the first shows with Tiger — Tiger is a big element, you’re right,” Knight said. “And he just disappears.”

Brady buncheswhich ran from 1969 to 1974, also starred Susan Olsen (Cindy Brady), Maureen McCormick (Marcia Brady) and Mike Lookinland (Bobby Brady) as additional siblings, with the late Florence Henderson as matriarch Carol Brady, Mike’s wife of Robert Reed. Brady. The series is available to stream on Pluto TV and Paramount+.