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.

An old enemy threatens everything Mark holds dear.

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.

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