How many series did David tenant do in Doctor Who?

David Tennant starred in a total of three full seasons of "Doctor Who" as the Tenth Doctor, which are Series 2 to 4. He also appeared in several special episodes, including the 2009 Christmas special and the two-part finale in 2010, bringing his total appearances to 47 episodes. His portrayal of the Doctor is widely celebrated and remains one of the most popular in the series' history.