The Timelord Brothers Series

The Timelord Brother Series is an AU fanfic series about Phineas and Ferb, who are The Doctor's sons, traveling in the TARDIS. This fanfic series takes place after The Doctor dies.

Planet Ornithorhynchus
Chapter 1: http://www.fanfiction.net/s/7441272/1/Planet_Ornithorhynchus

The Timelord Brothers
Chapter 1: http://www.fanfiction.net/s/7299997/1/The_Timelord_Brothers Chapter 2: http://www.fanfiction.net/s/7299997/2/The_Timelord_Brothers Chapter 3: http://www.fanfiction.net/s/7299997/3/The_Timelord_Brothers Chapter 4: http://www.fanfiction.net/s/7299997/4/The_Timelord_Brothers

Other
New, New Phineas: http://www.fanfiction.net/s/7435842/1/New_New_Phineas The Parting: http://www.fanfiction.net/s/7438941/1/The_Parting

Main Ones

 * Follow in My Footsteps: The only difference is that Phineas and Ferb WANT to travel in the TARDIS just like their dad used to do.
 * Senseless Sacrifice: Both brothers are shocked when the Daleks are still around.
 * Strong Family Resemblance: Phineas behaves like the 10th Doctor, while Ferb acts like the 11th Doctor.
 * Vocal Dissonance: The Daleks sound exactly like John Viener, who voices Norm the robot in the original PnF universe.