Jonathan Goldsmith (Felix Manning) later played "The Most Interesting Man in the World" in Dos Equis commercials.
First appearance of the on-screen hawk transformation. Although Jonathan changes into a hawk in Manimal (1983), only the on-screen panther transformation was used.
Apparently Jonathan sold his black Cadillac De Ville stretch limousine to the Bulgarian embassy between Manimal (1983) and "Illusion". Either that or the producers only had access to one such vehicle.