Foster is the head of Emperor Zing's elite guards.
In "Lost in Space", he introduces Jeff Fischer to his new job as slave in an giant space shopping mall, working at a shwarma stand. Jeff discovers that the only way he can regain his freedom is to prove his love for Hayley at the risk of losing his privates. When he fails, based on the memories shown by The Majestic during a mind probe, he protests that only the bad memories were shown. Facing The Majestic, he learns that after Emperor Zing lost his own true love, he declared a war on love and forbid it to be shown. As Foster prepares to remove Jeff's privates, he finds Jeff was replaced by a shape-shifter and is kicked off of the platform, where he is beaten by the slaves during their revolt.
Foster is voiced by Sean Hayes.