Finish the pilot episode
Finish the final episode ( perfect not required )
Finish all episodes ( perfect not required )
Unlock the second season
Finish all episodes from the first season ( perfect not required )
Finish all episodes from the second season ( perfect not required )
Unlock the third season
Unlock the fourth season
Finish all episodes from the third season ( perfect not required )
Unlock the final episode
Finish all episodes from the fourth season ( perfect not required )