b997eee8_CCG___What_s_That_Inside_Joke___In_joke
[Card] An Ultraviolent Death [Exp.] Reject RD2 [Type] Ref [In-joke] 
The card refers to Mary Whitehouse who was the founder of the National Viewers' and Listneners' Association who campaigned for morality and decency on public television, and so was a big opponent of Doctor Who, which was too violent for her tastes. A Fix With Sontarans has a death scene that is, of course, way too violent for a Jim'll Fix It feature starring an 8-year-old boy.
Unauthorized Dr. Who CCG - What's That Inside Joke?
In-joke