Marek was a citizen of the Sphere.
While living on the Sphere, Marek met Zara and they conceived a child together. Marek escaped the Sphere before it was destroyed, and sought Abby and Zara through time and space. (AUDIO: The Sphere, The Fog)
When Marek found Zara, he helped her with her pregnancy, then fled with the child to protect her from the pirate Kreekpolt. Marek was eventually tracked down by Zara. Marek joined her mission to do good in the universe. (AUDIO: The End)