The leader of an alien recon party on Earth discovers he has "feelings" for a professor.

When Tommy catches a bug, the crew gets its first taste of human illness.

Dick is introduced to the concept of birthdays--and it dawns on him that he's getting old.

While Sally does a slow burn at being the often-overruled second in command, Dick lights up his life by taking up smoking.

Dick discovers the emotion of jealousy when Dr. Albright's old boyfriend returns to visit on a promotional tour of the novel he dedicated to her. Harry adopts a stray dog.

Dick's one lonely guy when Dr. Albright goes on vacation. Sally and Harry are lured by skin-care products that promise eternal youth.

When an obnoxious professor dies during a party in his honor, Dick finds the will specifies that he must deliver a “forthright and honest” eulogy about the universally despised academic. Tommy neglects his female pal August to hit it off with an “easy” cheerleader.

Dick receives a roundabout lesson in family values from Dr. Albright's loopy brother, who claims to have been abducted by aliens.

Dick discovers the consequences of unvarnished truth when he repeats some of Dr. Albright's unflattering comments at an academic committee meeting. Sally and Harry apply for driver's licenses.

While Dick and Harry take up painting (Harry's good; Dick isn't), Sally takes over the school bake sale with the gusto of Gen. Patton.

A snowstorm -- the Solomons' first -- spoils Dr. Albright's trip to Chicago, leaving her stranded in a truck stop with Dick.

The Solomons learn about the give and take necessary to human friendships when they turn their anthropological gaze to the next-door neighbors.

When Dick's evasive about his past, Dr. Albright suspects he's a '60s radical fugitive. Harry joins a CD-of-the-month club, and is swamped with CDs.

Flummoxed by feminism, Dick dons a dress to infiltrate Dr. Albright's women-only study group. Harry and Sally get jobs at a pancake restaurant.

Dick decides that the Solomons don't ôfit in” on Earth, so he shops for an ethnic group to join. Meanwhile, Sally wants to fit in with Tommy's handsome teacher.

The Solomons' faith in human nature is shaken when they fall victim to crime (""This planet is in a bad neighborhood,"" sighs Sally). Meanwhile, Dick makes Tommy join the school basketball team.

Dick decides the reason Harry is “odd” is because he lacks a father, and sets out nurture the suddenly rebellious Harry. Meanwhile, sparks fly when Sally meets the hostile mother of her boyfriend.

Albright gets a new office, much to Dick's chagrin. Sally lands in the hospital---where she, Harry and Tommy pretend to be “ER” doctors.

Dr. Albright finally agrees to date Dick and Harry receives an ominous message from the home planet.