Infiltration

Taking a joyride in the Hyperion, Mahad and Lena nearly crash into Jonah, a security specialist fleeing the Sphere. Jonah explains he was hired to create a particular temporary holding cell on the Monolith for a "very important Seijin". Mahad and Lena are overjoyed -- it's probably their mother and now they know EXACTLY where to find her!

Mahad comes up with a plan that gets him and Lena onto the Monolith. Using Jonah's ID card, the robots think Mahad is Jonah. Meanwhile, the robots have been reprogrammed not to recognize Lena at all. Jonah however escaped using the Hyperion and was intercepted by Diwan, revealing that he was not the one inside The Monolith.

Diwan orders the robots to reset themselves, revealing Lena who is attacked by the robots. Diwan warns Oslo to stay aware (the children might endanger him) but he refuses, and boards the Monolith with the prisoner, intent to capture the children.

After some careful maneuvering, the children are blissfully reunited with their mother, only to be surrounded by robots along with Oslo and Diwan. Lena manages to defeat Oslo and escape with Lena. Oslo orders Diwan to allow them passage to the docking bay, where it will be easier to capture them.

Ambushing them there, Oslo is briefly detained when Jonah uses the anti-Saijin device to disable his powers and tackle him off the ledge. Despite this, Mila predicts that Oslo won't be out of commission very long, and decides to stay behind to battle Oslo.

Mila is correct, as Oslo flies back up to the platform, and is hit by an energy blast by her. Apparently despite dimming the lights, Mila was able to regain some use of her abilities.

Mahad agrees to go ahead with Lena to regain the Hyperion, but after boarding circles back in a final pass on the way out to pick up their mom. Mila however uses her powers to take control of the plane and force it outside of the Monolith, as she stays behind to continue to hold back Oslo.

With the docking bay open, the light allows Mila to hold her own, but as the doors close she is unable to continue fighting (Oslo can, since he gets light injections to allow him backup energy when direct sunlight is not available) and ceases resisting Oslo, who smugly says he'll make sure she won't escape again.

Lena has a vision of the hangar where the Hyperion was found. Telling Mahad this is where they need to go next, the episode ends.

Note
In Canada this episode was originally scheduled to air as #24, right before the two-part finale, so this may explain the conclusion of the episode which does not continue into the two episodes listed below)