To Whistle or Not To Whistle – That is the question.
Turns out that the original version of the theme song did not include whistling, but instead a lyrical version that was sung by Everett Sloane. The producers however decided that the whistling version would work better. Good decision to say the least.
Fatherhood Tribute.
Later on, both Griffith and Howard admitted that their onscreen father-son relationship was entirely dedicated towards their respective dads. Griffith even went on to say that his onscreen reactions to Howard were based on the same reactions that his own father gave to him. Howard also went on to say that his own father influenced how he portrayed the relationship while filming.