Klute with Fonda.
For those of you older guys, the best IMHO, was The World of Suzie Wong. There was an award winning Broadway play (that I unfortunately didn't see as I was too young) that had, believe it or not, a young William Shatner who won Best Actor and France Nuyen as Suzie Wong, winning Best Actress. Few years later was made into a film (that I did see then) with William Holden and Nancy Kwan. There is a DVD available.
For you guys who like drama it's worth seeing, for you guys who just want to see tits and ass, not so much.