I agree that when diana rigg left, the magic was lost. The show never got to be bad, but after Diana Rigg left, it lost much of what made it so extraordinary. Maybe I wasn't disappointed because I didn't expect that anyone could equal the original. Good show, but the movie sucked. Steed never had any romantic intrests for Catherine Gayle or Emma Peel.
Romance always ruins a show.
Tara was an inept professional. Steed had to spend his time, fighting bad guys, rescuing Tara and romancing Tara every episode. This program was a great British production with Steed and Mrs. Peel playing off each other very well. Patrick McNee and Diana Rigg played their characters to a tee. Some great story lines with the death dream episode being one of the best.