In the conclusion of the four-part story "Image of the Fendahl," the malevolent mythological Gallifreyan figure Fendahl has taken over the minds and bodies of black-arts practitioner Maximillian Staehl (Scott Frederick) and his followers. The Doctor (Tom Baker) struggles to prevent these new "Fendahleens" from wreaking havoc and destruction throughout the universe. His only weapon: a small but potent supply of rock salt. Robotic dog K-9 (voiced by John Leeson) makes a cameo appearance. Written by Chris Boucher, "Image of the Fendahl, Episode 3" first aired on November 19, 1977. ~ Hal Erickson, Rovi