b997eee8_CCG___What_s_That_Inside_Joke___In_joke
[Card] Fred - Disused Yeti [Exp.] Inv [Type] Ref [In-joke] 
The subtitle refers to a line from The Enemy of the World, where the Doctor mishears "disused yeti" for "disused jetty".
Unauthorized Dr. Who CCG - What's That Inside Joke?
In-joke