It's a typical day in the life for Mark: he attempts to deal with his zombie roommate, his demonic girlfriend who wants him to meet Daddy, and Homeland Security's efforts to use Mark's client list to meet their quote of illegal immigrant roundups so they can win a ham.
Mark tries to deal with a werewolf integration case, but has more on his hands when Randall can't resist his zombie urges, and Leonard decides to top his brother Christ Angel by performing the ultimate illusion: resurrecting Mark from the dead.
When Mark takes care of an abandoned demon baby, Callie finds herself suffering from strange maternal demon impulses, and Twayne smells her pheromones and grows a mating bone.
Mark accidentally outs his roommate as a zombie; Leonard tries to identify a strange new creature.
Mark meets a pair of creatures who are expected to participate in a public mating ritual.
As the city contends with a bizarre epidemic, Mark counsels a young woman who wants to become a vampire.
When the budget for social services is cut, Mark and Leonard find themselves with time off. Mark tries to help Randall, who has been severed at the waist and needs new legs, while counseling a giant ape with OCD. Meanwhile, Callie and Twayne attend a demon convention, and Callie worries that Twayne is hitting on her.
Mark counsels Tim the two-headed worm creature and gives psychiatric evaluations to Department of Integration employees while Randall seeks to become a proper zombie.
Mark tries to help Leonard with his wand issues, Twayne meets his soul mate.
Twayne is forced to endure a series of difficult consequences when he decides to make a horrendous agreement regarding a local politician's soul.
Mark and Randall go down to hell to spend Halloween with Callie's family who have some special plan for Mark.
After Randall joins the cast of a sleazy reality show, the program’s unbalanced producer becomes obsessed with Mark.
Because of Mark's Zechalech gift, Callie is under the impression that he wants her to suck out his soul.
Mark adopts a baby Man-Bird that was separated from its flock, while Grimes tries to settle a blood-feud with their champion.
Callie and Twayne build a summer camp as part of their plot to infiltrate a secret wizard compound where Leonard is training his apprentice.
Callie's parents get back together and have a new baby. But when their marriage falls apart again, Callie must play guardian to this younger, hotter spawn of the devil.
The end of his favorite TV series, "Dishonorable Discharge" sends Grimes off the deep end. Mark has to help him get to the bottom of his inexplicable attachment to the show, uncovering a deep seated memory along the way.
Mark inadvertently learns of a plot to end humanity when he's drafted into Satan's Dark Army with Twayne.
After Mark finds a ring in Leonard's desk, he inadvertently activates the wizard's engagement from a bygone era, when dragons roamed Earth.
Callie hopes that making a clone of Mark will guarantee the Department of Integration's win in a bowling tournament, but the plan backfires when the duplicate tries to frame her for murder.
Randall's idea to sell Mark's soul on the Soul Exchange draws interest from Callie and her father. Meanwhile, Grimes thinks he's found the next great pop-music sensation.
Twayne throws a company party aboard a cruise ship; Randall gets sick from dangerous pollen.
Callie reveals to Mark that she's been sleeping with other guys, while a girlfriend from Marks past returns with a dark secret.
Randall feels neglected; Grimes mummy returns.
An ant-sized arsonist named Jerry flees Mark's custody, escaping up Twayne's nostril. A miniaturized Leonard, Grimes and Mark must track Jerry through Twayne's body to bring him to justice.
With the big company intramural football game around the corner, everyone starts getting nervous about the lineup -- Mark is a wonderful team player, but a terrible actual player. When Randall demonstrates the power of his recently replaced arm, he is given a job at the D.O.I. as the team's ringer.
In honor of Twayne's 10-year anniversary of running the D.O.I., Callie and the crew throw him a Roast. But when Mark's attempt at edgy humor goes too far, Twayne quits, leaving Mark in charge. Before his first day as boss is up, Mark makes a management mistake so catastrophic that it almost destroys New York City.
Mark becomes conflicted about his relationship with Callie. He does his best to be understanding, but their love is soon put to the test when they are asked to embark on a dangerous mission to the fabled underwater city of Atlantis.
When the country's biggest pop star (Lady Hoo-Ha) turns into a zombie, millions of her devoted fans follow suit; Mark befriends one of the new zombies and Randall is forced to deal with his jealousy issues.
After being bitten by a rabid Bat-Boy, Mark becomes a masked crimefighter; Mark wages war against New York's criminals and their catlike leader with the help of his loyal sidekick, Koala Man.
Mark chooses April Fool's Day to ask Callie to take their relationship to the next level, but his romantic gesture is threatened when Callie's vengeful ex-boyfriend returns to win her back; Leonard tries to redeem a winning lottery ticket.
Go behind the scenes with the creator of Ugly Americans.
