Dick Dastardly's plane is red, Zilly's plane is green, and Klunk's plane is blue.
When Muttley attempts to catch the pigeon by flattening him with the anvil, he accidentally flattens Dastardly, Zilly and Klunk individually in each of their planes.
The sound waves of Dastardly's voice quoting, "Muttley, you'll lose your medals for this!" appears to be coming out of Zilly's flattened green plane instead of Dick Dastardly's flattened red plane.
Dick: There he is, a thousand feet below us! Jump, Zilly. Jump!
Zilly: Who, me? You gotta be kidding, D.D.
Dick: This idea better work, Klunk, or you'll wind up in the clink.
Dick: We're gaining on him now, Muttley. Get ready to rock him.
This episode had an advance screening in its entirety on CBS's Saturday Morning Preview special, aired on September 7, 1969 (7:30 PM EDT). The special was hosted by Family Affair cast members Johnnie Whittaker, Annisa Jones and Sebastian Cabot.