Complex sentence: It later became a running gag in the series after Thomas told his friends Theodore "T.C." Calvin, and Orville "Rick" Wright about his idea, the series also never tells the audience if this is true or not.
Split into simpler sentences: It later became a running gag in the series after Thomas told his friends Theodore "T.C." Calvin, and Orville "Rick" Wright about his idea. The series never tells the audience if this is true or not.