This would mark Eartha Kitt's final performance before becoming blacklisted in Hollywood for several years. Shortly after the episode aired, Kitt openly spoke her mind regarding several social issues during a White House Luncheon, insulting First Lady Lady Bird Johnson in the process.
Although this episode aired in early 1968, a portrait of then former Vice President Richard Nixon can be seen on Lucky Pierre's office desk. Less than a year later, Nixon was president. Coincidentally, Pierre Salinger, who played Lucky Pierre, was the press secretary to the man who defeated Nixon in the 1960 presidential election, John F. Kennedy.
Pierre Salinger's character name on this episode, Lucky Pierre, was his off-screen nickname. Former Press Secretary under Presidents John F. Kennedy and Lyndon Johnson, he also served, briefly, as junior U.S. Senator from California (1964-65), at the sudden death of Clair Engle. He eventually became a well-known freelance TV journalist.
When Batman, Robin and Batgirl arrive at the Lighthouse, Joker says the heroes should be dead. The cliffhanger bridging the previous episode with this one was to originally to involve an elaborate death trap. However, budgetary constraints lead to such a prop being scratched, and while the cliffhanger scenes were rewritten, the Joker's lines referring to it remained in the script.
"Lucky Pierre", Catwoman's attorney, was played by Pierre Salinger (uncredited), press secretary for President John F Kennedy and Lyndon Baines Johnson, all members of the US Democratic Party. In a sight gag, "Lucky Pierre's" desk features a picture of Republican Richard M Nixon, JFK's opponent in the 1960 US Presidential Election and US president from 1969-1974.