Co-Star June Lockhart (Maureen Robinson) says about May:
"He always said he got the job because he fit in the robot suit. It was one of those wonderful Hollywood stories. He just happened to be on the studio lot when someone saw him and sent him to see Irwin Allen about the part. Allen said, 'If you can fit in the suit, you've got the job.'"
"He was particularly fond of his Robot role, once saying he came to consider the suit a 'home away from home.'"
"He wore the suit for hours at a time and learned the lines of every actor in the show so he would know when to respond to their cues. Because it wasn't easy to get in and out of the suit, he kept it on during breaks."
"He was a smoker... From time to time (when he was on a break), we'd see smoke coming out of the robot. That always amused us."