This is an enjoyable pilot TV-movie for the famous series. The plot is fairly elaborate, and in fact, it works much like a Mission Impossible episode, but with a totally different emphasis.
At the time this series aired, and for years afterwards, there was a huge amount of blather and tsk-tsking disapproval expressed in the media about this series, because the premise was three beautiful young women as detectives. There were plenty of tougher. Much grittier series around the same time, such as Police Woman with Angie Dickinson, or Hawaii 5-0; lots of shows. Charlie's Angels took a different approach: it didn't try to make the women seem like tough gun-wielding types. They were all attractive; but frankly, so were nearly all the women portrayed in TV series at the time!
Looking at the show now, in 2023, 47 years after this pilot was made, it strikes me as perfectly pleasant, light entertainment. And to me it stands the test of time: I watched it tonight, and it held my interest.
The guest cast are good. One of the actors is a very young Tommy Lee Jones! I thought it looked like him, but I didn't believe it until I saw the credits. That's part of the fun of these old TV series, the surprises you get as you watch them. I look forward to watching all the rest of the episodes on dvd.