IMDb Channel on Amazon has all seasons for free (with ads, of course)..

I've been watching this series on Amazon and it is so much better than I remember. On top of that, Stuart Margolin does so much of a better job than what I recalled (I used to really dislike his role, but in re-watching, he does such a good acting job).

And James Garner, what a gem. Yes, some episodes have some really corny segments, but still...this show is pretty good.