Pilot

Sam Casey's digital watch had an LCD display at a time when red LED displays were commonplace. That was cool.

I loved this show but even as a kid I had trouble believing the central conceit that Sam had exactly 15 minutes of invisibility per calendar day. Apparently, he could go 30 minutes straight if he started at 11:45 PM, because he got a new 15 minute allocation every day apparently irregardless of how much or when he last used his invisibility. He was physically fine while invisible for 14 minutes and 59 seconds, and then SUDDENLY he became incapacitated.

Would have been much more believable if he ACCRUED time at 15 minutes per 24 hours, and the watch kept track of his balance. Seems like a forced gimmick otherwise. Or how about the watch has a charge that can keep him invisible 15 minutes, but it needs to be recharged after that? Ah, who cares....