And that is what I learned today. The power of not only human emotions, but the need for human connection. What a family is like and what it feels to be a part of one, and what it means to be... Mother.
―Mother, narrating the final lines of the episode

Mother's Day is the seventeenth episode of 3Below and the fourth episode of Part Two.

Official Synopsis

Mother, the AI controlling the royals' ship, reflects on keeping the peace between her quarreling family. Morando discovers a secret hidden on Earth.





  • The Mothership is the narrator throughout the episode.
  • Colonel Kubritz learns that Aja and Krel are aliens in this episode.
    • She also strikes an alliance with alien bounty hunter, Tronos.
  • Krel comes up with an idea to connect Akiridion-5 and Earth with a wormhole generator.
  • Zadra begins to forgive Vex in this episode.
  • It is discovered in this episode that Gaylen's Core is hidden on Earth.
    • Morando even theorizes that this is the true reason why the Mothership brought Aja and Krel to Earth.
  • The main events of this episode take place one week after the events of "Moonlight Run".
  • Toby refers to the time he, Jim, Claire, Aja, and Krel captured lightning in a bottle from the episode of the same name.
  • According to Mother (up to this episode), it's been 42 days (or delsons) since the events of "Terra Incognita Part One", which is when the trio first crash-landed in Arcadia.
  • This is the first (and only) episode in Part Two of 3Below where Eli Pepperjack is absent.
  • Morando discovers that Loth Saborian has betrayed him by aiding the Resistance and the royals, and has him arrested.
  • AAARRRGGHH!!! meets Aja and Krel for the first time (outside of the episode "D'aja Vu").
  • The serene music played when Mothership is narrating at the beginning and end of the episode, as well as credits, is "For Absent Family" by Jeff Danna.
  • Stricklander and Barbara Lake make brief, non-speaking appearances in this episode. They are seen caring for the freed changeling familiar babies in Jim's old bedroom at the Lake House.
    • NotEnrique also makes a cameo in this episode. However, at the end of "The Eternal Knight: Part 2", he is seen leaving Arcadia with Claire, Jim, and the other trolls to New Jersey. It is possible he returned to help Strickler and Barbara to take care of the babies.


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