b997eee8_CCG___What_s_That_Inside_Joke___In_joke
[Card] The Doctor (4) - Holmesian Detective [Exp.] Basic [Type] Pun [In-joke] 
Holmesian: Refers as much to Sherlock Holmes as to Doctor Who writer Robert Holmes, who wrote the source episode.
Unauthorized Dr. Who CCG - What's That Inside Joke?
In-joke