An old enemy threatens everything Mark holds dear.

The Grayson household is upended when Mark returns to Earth with surprising new responsibilities. The Guardians of the Globe face dangers both at home and away.

After two challenging missions, the Guardians of the Globe struggle to work as a team. Meanwhile, Mark tries to balance his hero duties, personal relationships, and his future as a…

As Mark attempts to salvage his personal life, a new villain arrives, presenting Invincible with his greatest challenge yet. Donald grapples with his past.

Geri is presented with an interesting offer, and Liam jumps in to help.

Walker, Trey and Cassie prepare for what Captain James has in store for them at HQ.

Stella goes to Bonham for self-defense training; August excels in his boot camp training.

Stella continues her search for the necklace and starts putting together the pieces of the mystery.

James, Cassie and Trey appear to make some headway in their investigation.

Walker sets out on a mission; August opens up to Geri and Liam; Luna introduces Cassie to a friend.

Cassie, James, Trey and Luna start to put together the pieces of the Jackal case.

Geri is upset with Walker for not opening up to her; Cassie, Trey and James conduct more interviews.

Walker tries to make up for lost time and wants to be what Geri deserves. Cassie and Trey have their final interviews for the lieutenant position. Captain James advises Cassie…

It’s Walker’s birthday and Geri is pulling out all the stops, but her plans are thwarted.

Walker, Cassie and Trey are charged with keeping an 80-year-old grandmother and witness safe.

Trey and Liam try to help Walker figure out his next steps with Geri; Liam confides in Walker.

Walker’s lies about the Jackal case finally catch up to him; Stella makes a shocking realization.

Harry and Asta get surprise visits. Ben grows suspicious of Mike and Liv’s private investigation.

Harry and Asta team up with an unlikely ally to try to save the Earth.

In an attempt to gather information on the Grey Aliens, Harry puts Asta in harm’s way.

D’Arcy inserts herself into Harry’s mission, while Kate grows more uncomfortable in her own home.