The best episode written by Katie Mattila is "The Calling", rated 8.263/10 from 19 user votes. It was "directed by Colin Heck". "The Calling" aired on 10/24/2014 and is rated 0.3 point(s) higher than their second highest rated, "Old Wounds".
While the young airbenders look far and wide for Korra, Ikki is briefly captured by two Earth Empire soldiers. Based on what they say, Ikki leads the trio to the swamp. There, Korra is still haunted by visions of being hurt by her past enemies, but manages to connect to the siblings through the great banyan-grove tree's roots. After they beg her to resume her Avatar duties to face Kuvira, Toph's advice helps Korra to let go of her fears, bend the rest of the poison out of herself and re-enter the Avatar State.
Director: Colin Heck
Writer: Katie Mattila
Per Su's suggestion, Korra begins to learn metalbending. Opal admits her reluctance to leave Zaofu due to her obligations to her family while Bolin deals with his fear of learning how to bend metal. Meanwhile, Lin faces her past during an acupuncture sessions, forcing her to relive the circumstances which led to her and Su's strained relationship. After a cathartic release of her repressed emotions, Lin makes amends with her sister as well as Opal, who she convinces to travel to the Northern Air Temple to train with Tenzin. Elsewhere, Zaheer and his group determine Korra's whereabouts shortly after escaping Republic City, deducing that she was under the Metal Clan's protection in Zaofu.
Director: Ian Graham
Writer: Katie Mattila
Zuko, Azula, Mai and Ty Lee take a vacation to Ember Island. In the process, they come to learn more about themselves and each other as well as their desires for the future. Elsewhere, Aang and the others face off against a new adversary.
Director: Joaquim Dos Santos
Writer: Katie Mattila
The local thugs love Mr. Ping's soup so much, the noodle shop becomes a villain hangout.
Director: Michael Mullen
Writer: Katie Mattila
Rapunzel is sick of the constant bickering between Cassandra and Eugene, so she sends them off on a scavenger hunt as a bonding experience.
Director: Joe Oh
Writer: Katie Mattila
When Rapunzel discovers that Queen Arianna has an estranged sister, she invites her newly discovered Aunt Willow to Corona.
Director: Stephen Sandoval
Writer: Katie Mattila
Po and Mr. Ping must make things right when two Croc Bandits have a spat.
Director: Lane Lueras
Writer: Katie Mattila
Po plays a prank on Monkey with a fake love letter and their relationship is tested.
Director: Gabe Swarr
Writer: Katie Mattila
When Rapunzel gets booed, she becomes determined to win over her naysayer, a little old man who is loved by everyone in the kingdom.
Director: Stephen Sandoval
Writer: Katie Mattila