The Legend of Korra - Season 4 - Eps 4: The Calling
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.
About The Legend of Korra

Title: The Legend of Korra
First Air Date: 2012-04-14
Last Air Date: 2014-12-18
Status: Ended
Rating: 8.2/10 (from 2156 votes)
Language: EN
Seasons: 5
Total Episodes: 52
Network: Nickelodeon
Genres: Animation, Action & Adventure, Sci-Fi & Fantasy
Production Companies: Pierrot, Nickelodeon Animation Studio, Studio Mir
Synopsis
Avatar Korra, a headstrong, rebellious, feisty young woman who continually challenges and breaks with tradition, is on her quest to become a fully realized Avatar. In this story, the Avatar struggles to find balance within herself.
Cast

Janet Varney
Korra (voice)

David Faustino
Mako (voice)

P.J. Byrne
Bolin (voice)

Seychelle Gabriel
Asami Sato (voice)

J.K. Simmons
Tenzin (voice)

Maria Bamford
Pema (voice)

Kiernan Shipka
Jinora (voice)

Darcy Rose Byrnes
Ikki (voice)

Logan Wells
Meelo (voice)

Dee Bradley Baker
Naga / Pabu / Tarrlok (voice)