Hart to Hart
Death in the Slow Lane
1979, ABC
Role: Mason Parks

Screen captures

Video on YouTube

During this guest appearance, Jeremy formed a great friendship with the show's stars, Stefanie Powers and Robert Wagner. Later, he costarred with Stefanie in  Deceptions in 1985.

In a 1985 United Press International article, Jeremy reflected on Hart to Hart and his friendship with Stephanie:

We did Hart to Hart together and never lost each other. R.J. (Robert Wagner) is a good friend too...

It's always difficult in this business after an immense success such as Hart to Hart. What was so wonderful about Hart to Hart was that they made theirs such a stylish marriage. I thought what they did in Hart to Hart that was so wonderful was that, without being cutesy, they were able to show two people who were happily married. Amazing. 
 

IMDb page //  The Brettish Empire

Wikipedia page for "Hart to Hart"

Episode available on Season 1 DVD set of Hart to Hart:
Amazon U.S. //  Amazon U.K.