Hunter x Hunter (2011) Episode 21: Some x Brother x Trouble
Episode 21 of 148 of Hunter x Hunter (2011), aired March 3, 2012, 25 minutes. Available with English subtitles and dub where released.
Episode summary
Gon is upset that Killua was forced to kill. Gon is mad at Illumi and proclaims that he will go to Kukuroo Mountain to rescue Killua. As Gon and his friends depart, Satotz mentions that the Hunter Exam isn't over yet...