When "Roger Whittaker" (as played by Kevin MurphyKevin Murphy) appears at the end, everything he says is sung like a line from "The Last Farewell," Mr. Whittaker's hit song.
MST3K Episode 301 {"Cave Dwellers"} is the sequel to Ator The Fighting Eagle. Ator was also given the RiffTrax treatment by fellow MST3K alumni Mike Nelson, Kevin MurphyKevin Murphy, and Bill CorbettBill Corbett.