Can somebody tell me how many Dr Who, David Tennant played the doctor, and what season numbers they were.?

[The Blue Pill]

I thought David Tennant has been the best Dr Who so far, not that Ive watched every series of the show. I just like the Series with David as the doctor. I'd like to know the Series number, and hopefully the name or number of his first and last episode, would be handy. Thanks