this is just beautiful!

Yes, it's a 70s series, we have some Tim O'Connors, Leslie Neilsens, Martin Sheens, Tom Skeritts, some Fritz Weavers, some Joan Van Arks, some Van Pattens, and Clu Gulager.

This could use a Quinn Martin tag.

Quinn Martin produced a ton of popular TV dramas during the 60s and 70s, often starring middle aged movie white male movie actors like Robert Stack, David Janssen, William Conrad, Karl Malden, etc. I didn't watch a whole lot of those back then, but those Quinn Martin opening credit sequences were incredibly distinctive, with signature use of graphics, cast list, and nearly always the same voice-over actor. The distinctive openings probably made Quinn Martin a household name in the 60s and 70s, which must have been unusual for a behind-the camer figure like a TV producer.