When Dewey's pet rabbit does good in a state contest, the family must travel to Las Vegas for the nationals. But Reese unknowingly sells the rabbit to a restaurant. Now it is up to Dewey (with a little help from a "choking" Reese) to try and save the rabbit. Meanwhile, Malcolm tells Hal and Lois that they embarras him, and that is why he didn't tell them he won state science honors. As a form of repayment, Malcolm gets great seats for him and Lois to see Lois' favorite singer. Lois then gets lucky and is invited backstage where all she really wants to do is figure out why Malcolm doesn't want her around. Hal, on the other hand, is looking all across Las Vegas for a slot machine that he has had dreams of winning the jackpot on. Francis is also in trouble when he gets behind on duties at the ranch, and for the first time sees that Otto isn't just a pushover for everything.
Episode credits
Directed by Bryan CranstonWritten by Michael Glouberman, Andrew OrensteinGuest stars Teresa Ganzel, David Cassidy, Ursula Whittaker, Darlene Kardon, Michael Merton, Donna Pieroni, Tom Lent, Jeffrey Anderson-Gunter
Hal and the boys offer to watch baby Jamie so an exhausted Lois can finally get some sleep. Hal leaves the boys in charge while he goes to the Lucky Aid to pick up more diapers. While the boys are watching Jamie, three beautiful teenage girls arrive and woo Malcolm, Reese and Stevie away for the night, leaving Dewey alone with the baby. Meanwhile at the Lucky Aid, Hal doesn't have enough money for the diapers and Craig forces him to work. Back at home, Dewey concocts an elaborate bedtime story for Jamie involving each member of his family.
Episode credits
Directed by Levie IsaacksWritten by Alex ReidGuest stars Kat Graham, Caitlin Crosby, Michelle Durham, Patricia Place, David Reynolds, Sharon Johnston, Nasser Faris, Craig Lamar Traylor
No one wants to tell Stevie his parents are getting a divorce, until Reese spills the beans.
Episode credits
Directed by Jimmy SimonsWritten by Neil Thompson, Gary MurphyGuest stars Kyle Searles, Devin Sidell, Brett Gilbert, Sarah Godshaw, John Vance, Wesley Barker, Craig Lamar Traylor, Kenneth Mars
Malcolm skips out on Thanksgiving to go to a party; Reese becomes abusive to Hal and Dewey as he attempts to prepare Thanksgiving dinner.
Episode credits
Directed by David D'OvidioWritten by Matthew CarlsonGuest stars Alessandra Torresani, Marshall Allman, Joel Anderson, John O'Brien, Joyce Corradetti, Emy Coligado
Malcolm chooses Reese as his subject for an Abnormal Psychology mid-term project; Dewey earns some extra cash as a street performer.
Episode credits
Directed by Levie IsaacksWritten by Dan KopelmanGuest stars Joan Blair, Don McManus, Julian Barnes, Jennifer Shon, Jonny Acker, Darryl Reed Jr., Craig Lamar Traylor, Kenneth Mars
Malcolm gets a job working for Lois on the drugstore loading dock but is shocked to find that Lois smokes. She makes him promise not to tell, then turns her back on him and writes him up for a silly offense. Meanwhile, Dewey runs away to the Ranch to be with Francis because he says he is tired of Reese and Malcolm. Hal is also busy, secretly betting on and entering Jaime in baby competitions.
Episode credits
Directed by Steve WelchWritten by Maggie BandurGuest stars Todd Stashwick, Holmes Osborne, John Eric Bentley, Michael Dean Jacobs, Craig Lamar Traylor, Julie Hagerty, Kenneth Mars, David Anthony Higgins
Hal, Reese, Malcolm, and Dewey go into business selling Christmas trees, with the boys using some of their own money, but two priests send homeless people to their business, trying to sabotage their sale.
Episode credits
Directed by Steve LoveWritten by Alex ReidGuest stars Patrick Thomas O'Brien, Vic Polizos, Casey Sander, Ted Rooney, Mark L. Taylor, Tom Towles, Larry Hankin, Jonathan Schmock
Neighbors have the annual "The Wilkersons are gone" block party until they come home early. Reese and Dewey set up a plan to get money by letting Reese-tortured kids get revenge. Hal and Lois enter a kielbasa-eating contest and Malcolm unknowingly assists a robbery, but a surprising twist comes in the end.
Episode credits
Directed by Levie IsaacksWritten by Rob UlinGuest stars Paul Willson, Mark Moses, Randall Carver, Shashawnee Hall, Margarita Franco, Paul Schackman, Penny Balfour, Stephen Rockwell
Malcolm alerts the A.C.L.U. when he encounters censorship working on the high-school literary magazine; Hal tries to flirt with the woman in his office responsible for cutbacks.
Episode credits
Directed by Bryan CranstonWritten by Eric KaplanGuest stars Hallie Todd, Frederick Koehler, Lori Beth Denberg, Kurtwood Smith, Craig Lamar Traylor, Nikki Crawford, Michael Monks, Nicole Mansour
Jamie's babysitter coerces Malcolm into doing a "small" task for her; Dewey finds a friend, only to lose him to Reese; Francis persuades Otto to confront an old adversary that once courted Gretchen.
Episode credits
Directed by Jimmy SimonsWritten by Andy BobrowGuest stars Ryan Malgarini, Robert Joy, Meagen Fay, Ned Schmidtke, Barton Tinapp, Julie Hagerty, Kenneth Mars
Malcolm gets his tongue pierced and needs to hide it for a month. While Lois' mother, Ida, comes and annouces that she will marry a rich Chinese Man that she met on a cruise. Malcolm gets complications when his tongue ring gets infected, rendering him unable to say "S's" and he discovers that Ida has been drugging her fiancé with opiates and mood enhancers. When Lois and Hal confront Ida, she drugs them with free food. But luckily, the fiancé misses a drug treatment, and realizes that Ida is a terrible woman and he leaves her at the altar. Malcolm is punished for his tongue piercing. Meanwhile at the ranch, Otto decides to hire a murder mystery acting troup, but it all turns out badly.
Episode credits
Directed by Peter LauerWritten by Neil ThompsonGuest stars James Hong, Patrick Bristow, Cloris Leachman, Dan O'Connor, Kristina Hayes, Andy Umberger, Larry Clarke, Christie Lynn Smith
Malcolm is convinced to play Softball by Lois and ends up doing very badly at it due to Lois's hold on him. Meanwhile, Francis tries to pick fights with Lois, Reese tries to break Francis's record of collecting toilet seats from a local junkyard, and Hal accidentally applies to become a member of the CIA.
Episode credits
Directed by Ken KwapisWritten by Michael GloubermanGuest stars Kaitlin Cullum, Michael Gaston, Ingo Neuhaus, Tom Simmons, James Martin Kelly, Brandon Mauro, Kerry David, Brooke Radding
Lois' younger sister, Susan, pays the family a visit and brings with her expensive gifts for the boys, biting remarks for Lois and a cold shoulder for Hal – whom she has never forgiven for dumping her for Lois. Lois and Susan's competitive relationship takes a turn for the worse when Susan gives Malcolm and Reese her prize '65 Mustang convertible. But when Lois discovers that Susan needs a kidney transplant, she puts her anger aside and offers to donate her kidney to Susan, which Susan only sees as the perfect opportunity for Lois to one-up her.
Episode credits
Directed by David D'OvidioWritten by Gary MurphyGuest stars Laurie Metcalf, Abigail Mavity, Kevin Cooney, Lyndsy Fonseca, Heather McPhaul, Jasmine Di Angelo, Kate Miner, Josh Jacobson
Lois blows her top over a hidden 15 percent surcharge on the bill at her family's favorite pizza place and stages a boycott...but Hal and the boys are sneaking slices on the side. Malcolm meets Angela and becomes instantly smitten with her intellectual family...but starts to feel like a heel because he's asked another girl to the school dance and is forced to break it off with her--er--them. And Francis is reluctant to let Otto hire an assistant for him...but soon comes to like the idea.
Episode credits
Directed by Steve WelchWritten by Rob UlinGuest stars Eddie Shin, Sherman Howard, Sara Paxton, Craig Lamar Traylor, Nike Doukas, Helen Slayton-Hughes, Matt Crabtree, Rachel Vacca
Francis is determined to show his parents why they should not have kicked Reese out. Meanwhile, Malcolm helps a football player write a college essay.
Episode credits
Directed by David GrossmanWritten by Dan KopelmanGuest stars Michael Dempsey, Patricia Belcher, Jack McGee, Jonny Acker, Gregory North, Brian Mulligan, Roderick M. Spencer, David William James Elliott
Lois tags along with Malcolm as he visits a college, but she's determined to room in the dorm Malcolm is staying in when she learns the room is co-ed. Meanwhile, after his father denies him a piano, Dewey begins stealing objects from around the house to amuse himself and to drive Hal crazy. Reese meets a girl, who he thinks is a narc, and he pretends he is a dealer, unaware that she is really an undercover cop.
Episode credits
Directed by Peter LauerWritten by David WrightGuest stars Evan Sabara, Cole Petersen, Jamie Renée Smith, Monique Coleman, Stephanie Lemelin, Daniel Farber, Andrew Reville, Jordan Orr
Hal sets up Abe Kenarben on a blind date with Jaime's babysitter Polly but then realizes Lois has also set her up on a blind date - with Craig. Malcolm, Dewey (with his "lucky" shirt) and Reese also meet Reggie Jackson and Francis is embarrassed by Piama in front of his co-workers.
Episode credits
Directed by Steve LoveWritten by Matthew CarlsonGuest stars Reggie Jackson, Craig Lamar Traylor, Julie Hagerty, Harley Zumbrum, Kimberly Jackson, D.J. Lockhart-Johnson, Ted Giannoulas, Ron E. Dickinson
Malcolm convinces Dewey to do poorly on an I.Q. test, so that he won't become a ridiculed Krelboyne student. But Dewey does so badly that he is placed in a class for the emotionally disturbed. Hal and Craig compete in a dance competition.
Episode credits
Directed by David D'OvidioWritten by Maggie BandurGuest stars Amy Castle, Craig Lamar Traylor, Kenneth Mars, Matt Malloy, Dennis Bendersky, Ayla Kell, Christopher Gerse, Louan Gideon
When Dewey's annual candy selling event for school comes up, he uses the excuse of "these bars help support america" to sell them. Malcolm and Stevie attempt a science experiment, and are shocked when Reese begs to help.
Episode credits
Directed by Bryan CranstonWritten by Alex ReidGuest stars Regan Burns, Craig Lamar Traylor, Justin Martin, Gil Glasgow, Susan Leslie, Helaine Lembeck, Cathrine Grace, Carlie Westerman
When Lois tracks down her father's "other family," she meets Victor's "other wife" Sylvia, and learns something shocking about her dad.
Episode credits
Directed by David GrossmanWritten by Eric KaplanGuest stars Andrew James Allen, Cloris Leachman, Adam Wylie, Maura Soden, Tom Virtue, Betty White, Megan Hubbell
Reese's new girlfriend Beth is about as dumb as he is. Malcolm initially dislikes her but they soon get to like each other too much and Beth breaks up with Reese. Devastated, Reese runs away and joins the army under the false surname.
Episode credits
Directed by Steve LoveWritten by Andy BobrowGuest stars Erik King, Emy Coligado, Molly Orr, James Henriksen, Monti Sharp, Kevin Crowley, Michael Chieffo, Paul Gleason
Reese continues to be a great soldier in the Army until he finds himself in a situation where his Sergeant cannot help. But after comparing being captured to being grounded, he takes action and leads his team to victory. But being such a successful soldier has it's bad parts as well, as Reese prepares to jump from the plane - right into Afghanistan. Malcolm has his hands full as well as he attempts to prove Hal innocent. But being good with numbers helps as Malcolm notices all of the prosecutions given dates are on Fridays - which Hal hasn't worked on in over 15 years. And with Reese missing and Hal's case, Lois falls deeper and deeper into insanity.
Episode credits
Directed by Peter LauerWritten by Andrew OrensteinGuest stars Jorge-Luis Pallo, Michael Milhoan, Emy Coligado, Michael Chieffo, Lindsey Ginter, Paul Gleason, Judith Moreland, Nate Torrence
