Anthony Newley and Stefanie Powers appeared together in the 1975 Comedy Heist film "It Seemed Like a Good Idea at the Time."
The Hart to Hart theme was written by Roger Nichols & Leslie Bricusse. Bricusse is well known for partnering with Anthony Newley, writing, among other things, the musicals 'Stop the World - I Want To Get Off', 'The Roar of the Greasepaint - The Smell of the Crowd', and 'Willy Wonka & the Chocolate Factory'.