b997eee8_CCG___What_s_That_Inside_Joke___In_joke
[Card] Alexander Leeson - Elite Student [Exp.] MoW [Type] Ref [In-joke] 
The nameless role was played by Leeshon Alexander. The name also serves as a homage to voice of K9, John Leeson.
Unauthorized Dr. Who CCG - What's That Inside Joke?
In-joke