Alternate intro?


CSI Level One
So I own seasons 1-9 and have watched them through countless times.. but I recently downloaded season 1-7 and am currently watching my way through season 1 again.

I'm wondering which version of these files I've downloaded... There were few to no online options available, so I went with the only files I could find. The Pilot episode was one I had never seen before.. it had different edits and a different actor playing Doc Robins. Every episode in season one also has this alternate intro:

None of the DVDs that I purchased in Canada (region 1) have this alternate intro or Pilot, so I'm wondering where the season was released like this?

Thanks guys!

*btw really enjoying the rewatch, wish it was more active here so I could share the re-lived nostalgia!