Sinopsis dan Bocoran Ending Serial The Avengers Season 6 Episode 28 (1969)

When one of the Acme Precision Combine is brutally stabbed, Steed and Tara are on hand to witness the crime, thanks to a telephoned warning. But why does somebody want them to see so many killings, and what does it have to do with Dr. Jaeger's aggresso-therapy clinic?