b997eee8_CCG___What_s_That_Inside_Joke___In_joke
[Card] Lilt - Brutal Undertaker [Exp.] AW [Type] PQ [In-joke] 
The quote refers to another double act, but since pretty much everyone in Revelation of the Daleks is part of a double act, this seemed interchangeable.
Unauthorized Dr. Who CCG - What's That Inside Joke?
In-joke