b997eee8_CCG___What_s_That_Inside_Joke___In_joke
[Card] Owen Harper - Callous Physician [Exp.] RD3 [Type] Pun [In-joke] 
The effect regarding Medicine-related Bang! cards is a reference to Owen's exploding rat, I admit it.
Unauthorized Dr. Who CCG - What's That Inside Joke?
In-joke