The Parting of the Ways
On 16 April 2005, the BBC confirmed that David Tennant would be the Tenth Doctor. The regeneration from Eccleston to Tennant took place in "The Parting of the Ways", the season finale. Tennant and Piper next starred in a for Children in Need. Tennant's first full story as the Doctor was the 2005 Christmas special, "The Christmas Invasion", and Piper joined him for the whole of Series 2.