Season 1 was filmed in the summer of 1964 when Luke Halpin was already 17 but a pilot of the series was filmed a year earlier when Luke was 16 immediately after he completed filming the second Flipper movie "Flipper's New Adventure". It became Episode 3 of Season 1 and the age difference of Halpin and co star Norden between Episode 3 and the Episodes 1 and 2 before it is obvious.