b997eee8_CCG___What_s_That_Inside_Joke___In_joke
[Card] Martha Jones - Housemaid [Exp.] 10D [Type] Rel [In-joke] 
The designer thought it funny to give each TARDIS Character with multiple versions in the 10D set a version dressed as a servant.
Unauthorized Dr. Who CCG - What's That Inside Joke?
In-joke