Although Robbie is just as nervous as everyone else, his presence in the house during Mary's weekend stay causes a great deal of concern among the Camden's. Matt and Lucy are especially suspicious after Lucy accidently finds a condom in a misplaced wallet. Imagine their surprise when they learn that the provocative prophylactic belongs to Simon--- who just so happens to be spending the evening with his new lady friend, Sasha.
After Deacon and Kelly's separation, Carrie begins to wonder about her own marriage. She and Doug agree to put their sex lives on hold for a few weeks because Carrie feels that they should resolve arguments verbally, not always physically. Meanwhile, Arthur dates a woman who claims she was once Frank Sinatra's girlfriend.
Max tries to stop Alex and Kyle from being buried alive in a cave filled with glowing blue crystals; Isabel is kidnapped by Grant Sorenson possessed by the alien parasite queen; Michael is shot while trying to protect Laurie.
Frank comes to visit Moesha at the dorm and confronts her about her attempts of helping Dorian find his mother. She explains to him that they both have to seriously talk. Later, Frank asks Dorian why he hadn't come to him first before seeing Barbara. Dorian tells him that he didn't want Frank to stop him and that he has his mother to count on now. Dorian visits his mother. When Barbara's sassy sister-in-law, Maya Wilkes, demands that she will not baby-sit for Reecy and Ray-Ray the same night that Barbara is expected to go out for the evening with her husband, Dorian volunteers to baby-sit, but discovers that they are more than a handful. Dorian tells Barbara that he should take his new relationship with her slowly after a few disagreements. Meanwhile, Moesha and Frank discuss the true facts about Frank's affair with Barbara and his rough marriage with Marguerite.
Joan decides to waive her ""three-month rule"" and sleep with Sean, but finds that the results are extremely disappointing. She seeks her friends' advice on how to help Sean improve his performance. Maya, with help from Toni, seeks medical attention after she and Darnell have difficulty conceiving a second child. William keeps having the misfortune of approaching every time Maya is discussing her gynecological situation with one of her friends.
A young woman named Samantha McGee claims that she and Kim were switched at birth, and that she is Nikki's real daughter. Meanwhile, Professor Oglevee enlists the help of Stevie and T to clean up his messy apartment, but they accidentally dispose of the ashes in the urn which is the remains of Stanley's deceased uncle.
Dylan is taken captive and forced to admit that he killed the Mobius leader and overthrew the Mobius government more than 300 years ago.
Ray is upset when he finds out that Debra signed up Michael and Geoffery to play fairies in a school play.
Lawndale High is low on funds and the students and Faculty need to start cutting corners.
Sarge prepares to have a romantic evening with Krider, another former member of the Black Watch. Later, she, Hel and Cleopatra are called to a safe house room where they are greeted by Marla. The team surveys the number of dead bodies filling the room. Among the fallen are some of Marla's guards, her right-hand man Kavilo and Dylan Degaillen, a noted member of the Black Watch who was acting as a double agent for Marla. When Sarge sees Dylan, she has a quick flashback of a firefight, but shrugs it off. Marla plays the holodisc that contains the incident that killed the men and everyone is shocked to see Sarge leading the ambush. Sarge insists she didn't do it, but Marla orders that she be arrested and charged with murder. Marla continues by saying that Sarge's trial shouldn't take long in light of the evidence on the disc. Both Hel and Voice think that Marla's system of justice has become a bit too efficient and the team makes a break for the door. Marla fires a mini laser tracker at Sa
John is honored when he's asked to fill in for the mayor and be the commencement speaker at his old high school, until he discovers why the mayor dropped out.
Dominic's kindergarten teacher, Mrs. Joseph, calls in Jimmy and Christine for a parent/teacher conference because he's been acting up in school. When they get there, they find out Dominic mooned the class. Recalling how her parents used to act when they were called in, Christine sticks up for Dominic by refusing to agree to the school's policy of making repeat offenders see a counselor. After Mrs. Joseph alerts her to the fact that Dominic may be expelled if they don't let him meet with the counselor, Christine yanks Dominic out herself and decides to home-school him instead -- a move everyone else thinks was hasty and foolish. Desperate to prove them wrong, Christine initially tries -- and fails -- to teach Dominic by way of a book, until Greg reminds her that Kim's the by-the-book parent. Christine's second plan, teaching by way of baking, is a success, leaving the others sorry they doubted her. But Christine has to put her pride aside when Dominic tells her that he misses his friend
The fate of the earth and the taelons may be revealed when three astronauts from the future are discovered in stasis hidden in a government base.
Richard and John's relationship grows more tense than ever and so they attend couples therapy; Jackson's presence has a profound impact on Elaine; Jackson represent a woman being sued for firing all her male employees.
A major hurricane hits the Hawaiian islands in which Sean is trapped with Jenna in a underground bunker which rising flood waters threaten to drown both of them unless they put aside their personal conflicts and hatred of each other to survive the day and night.
Lois gets a traffic ticket and immediately blames Francis and makes him get the money to her. To do this, Francis stages a stunt for the other cadets' amusement. Malcolm finds evidence that Lois was wrong about the traffic ticket.
Ellenor's chosen "sperm donor," Michael Hale (Ted McGinley), has second thoughts about the agreement over the rearing of her soon-to-be-born child. Meanwhile, Rebecca emerges from the I.C.U. and gets lost in the hospital. Additionally, Helen prepares to prosecute the rape of an eleven-year-old girl.
Nikita and Mr. Jones have The Collective's "mole" narrowed down to four suspects: Operations, Quinn, Walter and the late Marco O'Brien, but Mr. Jones has a fifth possibility that Michael Samuelle is still alive, and that he is the "mole." While granting to Mr. Jones the theoretical possibility that Michael may be alive, Nikita denies that he would never be the "mole" for The Collective, Graff and Haled. Meanwhile, Operations sets out personally to see to it that an anti-Collective mission goes according to plan, but it's The Collective that is poised to blow Operations' plane out of the sky! Can and will Nikita save Operations' butt, one last time or should she even bother?