The first piece of music heard in this episode is a snippet of "Good Morning, Good Morning" from the Beatles' "Sgt. Pepper's Lonely Hearts Club Band." The Beatles were such fans of the show that when they learned the Monkees wished to use this track, they graciously licensed it free of charge, with no royalties owed. This was the only time the Beatles allowed any of their recordings to be used in a film or TV show royalty-free. This was also the first time a licensed Beatles song was heard on a Prime Time television program.
"Frodis" was the Monkees' code word for marijuana, which they smoked occasionally in the lounge built for them off the soundstage where the series was filmed (called the "Frodis Room"). Micky Dolenz quashed rumors years later about harder drugs being used on the set, by the cast and crew: "The only thing anyone did besides smoke pot was drink beer."
Micky Dolenz directed this episode, as part of a deal worked out with series producers Bob Rafelson and 'Bert Schneider', who refused to let the Monkees direct themselves in their movie Head (1968). (Peter Tork also agreed to this deal, directing "Monkees Mind Their Manor".) After Dolenz moved to England in the mid-1970s, he became a television director, using the episode as his demo reel.
At about 6 and a half minutes into the episode, one of Wizard Glick's henchmen tells him that the Monkeemen monitor has been activated, adding that "it ain't been activated in 5 years". This means the fictional Monkees were together since at least 1963, and implies that they had battled Wizard Glick before.