I'm not much of a fan of magic, but I quite enjoyed this episode. I thought Harry Blackstone, Jr., did a marvelous job. Of course, he was well-known as an accomplished magician, but I thought what some considered his, say, "exaggerated" reading of his lines worked well and fit his character - especially since this is Hart to Hart, which is pretty much high camp all the time.
Unnecessary Disclaimer: I seriously don't like clowns; really, does anyone? But it cracked me up when the clown was slinging knives at Jonathan and kept hitting the balloons to his right (because of course, that's where all the balloons were set up on the board to be hit). I kept yelling at the screen: You're throwing right, aim more to the left!
And I thought Ms. Horan did a nice job in the lesser part of Vickie, the sweet, kind-hearted magician's assistant. Too bad she had to die - at least I think she did - I blinked and missed it.
Last, it was funny to hear Blackstone's resonant, theatrical voice coming out of Robert Wagner's mouth!
A surprisingly entertaining episode.