Complex sentence: The last new episode, "Mickey's Birthday," aired March 8,1959; the "Mickey" is a kinsman of Sky King portrayed in three 1959 episodes by child actor Gary Hunley.
Split into simpler sentences: The last new episode, "Mickey's Birthday," was telecast March 8,1959. The "Mickey" was a kinsman of Sky King portrayed in three 1959 episodes by child actor Gary Hunley.