https://www.daily-choices.com/little-known-facts-from-behind-the-scenes-of-gilligans-island/2?xcmg=1

In his book, Schwartz recalls Stromberg’s passionate plea, “Just picture it! Gilligan and his pet dinosaur! It’s our answer to ‘Mr. Ed!’”.

The wife had a few roles

Bob Denver's wife, Dreama Denver, had a few roles during both the running of the show and the last movie. During the original series, she had a role in a single episode as a cavewoman that had been hiding on the island since prehistoric times.

Another funny thing happened in 2001 when Russell Johnson was invited to speak at a biochemical conference in San Francisco (despite not being an actual professor). He recalls meeting 400-500 Ph.D.’s there and in his words, “every one of them was a Gilligan’s Island fan.” It sounds like a spectacular experience.

Thx - this is a good Summary !