In the episode's climax, KITT got hit with a rocket on the rear passenger side, with visible scarring as the rockets were fired. When the firing ceased, the scarring was no longer visible.
When Michael had KITT run a check of scuba rental businesses, a list of names that eventually repeated scrolled on the screen, rather than actual unique business names.
In the showdown against the hovercraft, the explosive mini-charges used to inidicate gun fire ricochets can be seen on KITT's stunt hood.
Michael: Smile, Quincy, you're going to be on Knight Industries Candid Camera.
Amy: I'll get changed, and we can go to the testing facility?
Michael: (sarcastic tone) Oh, the testing facility! Mmm, how romantic!
KITT: You know, given that it's such a special day for you, you seem a bit subdued.
Michael: Well, I guess it's just one of those birthdays when you realize you've had a lot of birthdays.
KITT: Michael, I detect no flagging of your vital functions.
Chuck: My name is Chuck. How'd you like to be my partner?
KITT: I have a partner. But we could be friends.
Chuck: (offended) Friends? With a car? That's ridiculous!
Michael: You know, it just occurred to me, that an afternoon by the pool and a candlelight dinner with a pretty girl is very hard to beat. Oh, I am moving too fast!? But then again, so is my vacation.
Michael: Devon, if I meet a pretty woman I want her to whisper sweet nothings into my ear, not crises involving military hardware.
Michael: (apprehending Vince) You're not much, but you're the only birthday present I got.
The German episode title is "Herzlichen Glückwunsch", meaning "Best Wishes". The French episode title is "Joyeux anniversaire", and the Czech episode title is "Všechno nejlepší k narozeninám", both meaning "Happy Birthday".
Music: Animotion's "Obsession" (cover version)
This marks the second of Peter Mark Richman's two, unrelated appearances on Knight Rider. He can also be seen in season two's "Goliath Returns."