They each have their own distinct personalities. But after four seasons on the show, it was announced that Mace Coronel, the actor who played Dicky, left the show. Screen Rant says that the news came in the middle of filming the fourth season, and there were still five episodes left to shoot.

Why was Dicky not in the last episode?

The network aired the fourth and final season of Nicky, Ricky, Dicky & Dawn the following year and explained Coronel's absence in the episode “Quadcodile Dundee” by revealing his character Dicky had gone to Australia as a foreign exchange student.

Does Dicky come back in Season 4?

Mace Coronel, who played Dicky on the series, announced in September that he left the program towards the end of filming Season 4 and that production would continue without him.