Edited sentence: The castaways then glue The Minnow, a shipwrecked yacht, together and afterwards, the Professor discovers it only lasts a few days.The funniest episode of Gilligan's Island was the one where Gilligan uses tree sap to make pancakes, and the professor discovers it makes the perfect glue.The story ends with a sight gag with the castaways watching in disbelief as the boat comes apart completely