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When a job opportunity opens up at Welltopia, Pat thinks Allison would be perfect for it, but Ken isn't so sure he wants to work so closely with his wife. Molly is stunned with her low SAT scores, and Dave has some ideas as to how to hide the results from their parents. Clark asks Damona's help in trying to find out what Clark's boyfriend, Connor, does for a living. Meanwhile, Ken's father, D.K., makes a surprise announcement.

On Allison's first work day at Welltopia, she and Ken try to prove the other wrong when it comes to a patient's diagnosis. After Damona introduces her new boyfriend, Eric, to co-workers, Pat surprises everyone and announces he's also dating someone. Meanwhile, it's Dave's first day of middle school, and he's nervous he won't be able to make friends, so he turns to D.K. to help reinvent his image.

When a neighbor girl stands outside the kitchen window staring at Albert, Molly and D.K. try to scare her off. Meanwhile, Ken is surprised when he learns that Pat, instead of him, is asked to emcee this year's annual Welltopia banquet; and Clark and Damona debate relationship styles as it relates to their individual partners.

When D.K. tells Ken he moved into the Park home because he's gotten a divorce, Ken can't shake the Korean cultural understanding that divorce equals failure and takes a look at his own marriage. Meanwhile, the divorce news causes Dave to reflect on his relationship with Emily.

On Halloween, Allison is disappointed the holiday doesn't seem to scare Dave anymore, meaning her little boy is growing up, perhaps too fast. But that might change after D.K. tells a scary Korean gwishin (ghost) story. The Park family, as well as the gang at Welltopia, bring the story to life playing the various gwishins.

Ken is urged to learn Korean when his father's friends poke fun at his inability to speak the language. Meanwhile, Allison helps Molly with her SAT vocabulary prep and Clark is proud to lead the nurses' contract talks, but isn't looking forward to negotiating with Pat.

When Dave announces he's been invited to pitch his Hot Legs Duvet invention on "Shark Tank," Ken is excited. But then he gets nervous about throwing his son into the Tank when he realizes how tough the Sharks can be. Meanwhile, Molly heads to Welltopia to intern, and Pat is so impressed that he takes her under his wing.

Allison convinces a reluctant Ken that it would be a fun family adventure to drive to her parents for Thanksgiving dinner. But along the way, a traffic jam combined with her husband and kids' antics causes her to lose her usual cool. Meanwhile, Clark takes charge to serve Thanksgiving dinner at a shelter for the homeless, but his bossiness and unnecessary attention to details drives everyone a little crazy.

When D.K. overhears Allison complain about him overstaying his welcome, he decides to move in with his girlfriend of three weeks. Meanwhile, Pat wants Dave to pretend he's his adopted son; and Allison is convinced Molly wants to talk about something when she suggests they do a spa day, but the tables turn when Molly is the one doling out the advice.

When Ken wants to apologize to a patient for missing an important medical detail, Pat advises against it, and the situation gets out of hand. Meanwhile, D.K. shakes things up at Dave's parent/teacher conference.

Allison wants to show her fun side to her Welltopia coworkers and offers the Park home for the office holiday party, but Ken isn't onboard with the idea. Meanwhile, Clark truly wants to give his boyfriend, Connor, the perfect present, but Connor upstages him with the ultimate gift; for the library's Christmas party, D.K. dresses up as an unlikely Santa and Dave dons elf garb; and Molly tries to impress a Stanford University official.

When Ken's attractive new intern, Erin, shows up at Welltopia, Allison starts to feel a bit insecure when Erin's admiration for Ken veers into flirtatious territory. Meanwhile, Damona's boyfriend, Eric, wants her to confront her musical past when he learns she was the lead singer on the C & C Music Factory's 1990 dance jam, "Gonna Make You Sweat." Molly's first date with Jae leaves her wondering if he really likes her, so matchmaker D.K. goes on a secret mission to see what he can find out.

Ken spirals a bit out of control when he finds out Molly's new boyfriend, Jae, is leaving behind his pre-med studies to be an artist. At Welltopia, Pat asks Clark to monitor his weight loss program; and when Damona learns she isn't required to wear scrubs, her new look results in several awkward moments.

Amy, the producer of a documentary health series, follows Ken around to record a typical day at an HMO, giving Ken his big moment in the limelight. But much to Ken's chagrin, a series of the less than thrilling day-to-day parts of the job at Welltopia leads Ken to doubt his own career choice.

When the star of Molly's high school basketball team injures his ankle, Ken's routine exam and unexpected diagnosis shocks everyone since it might keep the young man from playing in the big game. Meanwhile, Clark and Connor take another major step in their relationship before getting married, and Pat lets Allison in on the secret espresso coffeemaker he keeps in his office.

Ken lets Allison, who is second-guessing her decision to have a low-key Valentine's Day, think that a love poem Dave wrote for his sweetheart, Emily, is meant for her. Meanwhile, Molly and Jae consider Valentine's Day a corporate concoction; Clark plans a romantic scavenger hunt to lead Connor to his present; and complications arise when Damona and Eric have dinner at a restaurant that she and Pat once frequented when they were dating.

Pat refuses to accept Ken's diagnosis that his stressful relationship with girlfriend Megan is causing his mysterious rash. Meanwhile, Dave wonders how he can break up with Emily without hurting her feelings, and Clark invites Allison to a new meditation studio.

Allison finds a suspicious lump in her breast during a self-check leading Ken and the HMO group to rush to her side as she awaits the results of the doctor's tests anxiously; Dave tries to figure out how he will portray a character in the play.

Ken's old professor makes an appointment and torments Ken during his visit.

Pat eyes a promotion and asks Ken to put a good word in for him with the CEO of Welltopia.

Ken finds out about Clark and Connor's surprise wedding and is tasked with getting the guests there.

Ken's dream comes true when he's cast in a comedy series that takes place at a community college.