Dragon Ball Z Kai Season 4 Episode 7 Training Complete! Goku Sizes up the Competition! ( Air Date 2010-12-05 ) Genre Sci-Fi & Fantasy, Animation, Action & Adventure, Comedy category. Overview "Goku and Gohan finally emerge from the Room of Spirit and Time. However, sensing Cell's current strength, he is still unsure as to whether he is able to defeat him in his current state. ".