Kookie says, "I heard Cheyenne did that once in a TV show".
Albert mentions the show by name.
Roscoe says " that 'Cheyenne' cat Clint Walker"
Sheila Birtles mentions Cheyenne Bodie at the Walkers' Silver Wedding party.
Wide-eyed hick Morton Dill asks if the TARDIS crew know Cheyenne Bodie.
"Clint Walker as 'Cheyenne'" is listed in the closing credits.
Jeff and J.R. watch the show on TV in prison (dubbed in Spanish)