When does Rocky and Bullwinkle return?

The Adventures of Rocky and Bullwinkle and Friends is an American animated television series. It originally aired from November 19, 1959, to June 27, 1964, on the ABC and NBC television networks. The series is structured as a variety show, with the main feature being the serialized adventures of the two title characters, the anthropomorphic flying squirrel Rocket J. ("Rocky") Squirrel and moose bullwinkle J. Moose. The main antagonists in most of their adventures are the two Russian-like spies Boris Badenov and Natasha Fatale, both working for the Nazi-like dictator Fearless Leader.