Complex sentence: The alien Pilot first appeared in the Alien Force Episode Pier Pressure trapped in his set to explode ship he spawned Ship (whom he refered to as a symbiote) to get help and at the end of the episode he gave Ship to Ben and Julie.
Split into simpler sentences: The alien Pilot first appeared in the Alien Force Episode "Pier Pressure" trapped in his set to explode spaceship. He spawned Ship (whom he referred to as a "symbiote") to get help and at the end of the episode he gave Ship to Ben and Julie.