K-9 is a robotic companion constructed in the year 5000 by Professor Marius, who was given to the Doctor as a gift. There have been several models of K-9, which have all worked with the Doctor at some point. Edit

K-9 can be found in the Retro TARDIS layout in a box, requiring a high science and repair skill along with various parts found in the TARDIS to get him working again. Once reconstructed, K-9 can join the player on adventures, or be left in the TARDIS. K9 Can also be fitted with various upgrades. (Including a workshop, repair station, inventory, and the ability to play Rock Paper Scissors)