Anyway, in the third episode (original airdate: October 6, 1979), "Tuned For Destruction," UNIT agents Sloane and Torque are pitted against a rogue ex-general named "Wild Bill" McAvoy (the always reliable Geoffrey Lewis), and his personal aide-de-camp, Corporal Comfort (pretty soap opera vet Denise Duberry), who are using a newly-invented sonic, amped-up tuning fork "Metal Debilitator" (which can create instant metal fatigue in metal objects like safes, gates, etc.) to penetrate the defenses of a government facility in order to steal a nuclear bomb.
Of course, Sloane attempts to infiltrate McAvoy's private army by posing as a merc, only to be exposed immediately, and moments later, Torque – who had snuck into the villain's compound to back-up Sloane – is also captured... and his cybernetic hand disintegrated by the Metal Debilitator!
The boys ultimately escape and foil the plot, and there's a great helicopter-to-moving-halftrack transfer stunt by Conrad's stunt double to liven up the final act. There's also a pretty decent martial arts fight in the opening scene between Conrad (who appears to be doing most of the fighting himself) and an Asian mercenary.
Interestingly, McAvoy is revealed to be working for the organization KARTEL – a mysterious group of war profiteers and arms merchants first mentioned in the (at the time still unaired) TV movie pilot, T.R. Sloane (a/k/a Death Ray 2000).
• This is one of two Sloane episodes penned by Dick Nelson, whose other spy-fi writing credits include episodes of It Takes A Thief and The Man From U.N.C.L.E.