b997eee8_CCG___What_s_That_Inside_Joke___In_joke
[Card] Metebelis 3 (1972) [Exp.] Basic [Type] Ref [In-joke] 
The vortex for Misjump refers to the Doctor’s inability to get to this planet for a number of episodes after promising Jo to take her there.
Unauthorized Dr. Who CCG - What's That Inside Joke?
In-joke