Question: In "The Simpsons"' episode "I Married Marge," Marge thinks she may be pregnant and visits which doctor whose voice is provided by Harry Shearer?
Context: Dr. Julius M. Hibbert, usually referred to as Dr. Hibbert, is a recurring character on the animated series "The Simpsons".  His speaking voice is provided by Harry Shearer and his singing voice was by Thurl Ravenscroft, and he first appeared in the episode "Bart the Daredevil".  Dr. Hibbert is Springfield's most prominent and competent doctor, though he sometimes makes no effort to hide or makes light of his high prices.  Dr. Hibbert is very good-natured, and is known for finding a reason to laugh at nearly every situation. "Half-Decent Proposal" is the tenth episode of "The Simpsons"<nowiki>'</nowiki> thirteenth season.  It first aired on the Fox network in the United States on February 10, 2002.  In the episode, to earn money for her husband Homer's snoring problem, Marge agrees to stay with her old prom date, Artie Ziff, for one weekend (on the grounds that he try not to grope her like he did in "The Way We Was"), but when Homer thinks Marge broke her promise, he runs away with Lenny to work on an oil rig. "Luca$" (pronounced "Luca-dollar") is the seventeenth episode of the 25th season of the American animated sitcom "The Simpsons", and the 547th episode of the series.  It first aired on the Fox network in the United States on April 6, 2014.  It was written by Carolyn Omine and directed by Chris Clements.  In the episode, Marge thinks that Lisa is dating below her standards when she brings home a competitive eater-in-training named Lucas Bortner, so she enlists Homer to help Lisa explore other options.  Meanwhile, Bart receives gifts from Snake Jailbird for helping him get out of a jam, but when a betrayal from Milhouse sends Snake back to prison, Bart hatches a plan to get him out. "Colonel Homer" is the twentieth episode of "The Simpsons"<nowiki>'</nowiki> third season.  It originally aired on the Fox network in the United States on March 26, 1992.  In the episode, Homer embarrasses his wife Marge at a movie theater, leading to a big argument between the two.  Homer, angry at Marge, visits a redneck bar in the middle of the night where he meets a waitress named Lurleen Lumpkin, a talented singer.  Homer becomes Lurleen's manager and tries to make her famous, but he does not appear aware that Lurleen has fallen in love with him.  With Marge already upset and thinking Homer is cheating on her, he must decide on the importance of his marriage after Lurleen makes romantic advances toward him. "The Itchy & Scratchy & Poochie Show" is the fourteenth episode in the eighth season of the American animated television series "The Simpsons".  It originally aired on the Fox network in the United States on February 9, 1997.  In the episode, "The Itchy & Scratchy Show" attempts to regain viewers by introducing a new character named Poochie, whose voice is provided by Homer.  The episode is largely self-referential and satirizes the world of television production, fans of "The Simpsons", and the series itself.  It was written by David X. Cohen and directed by Steven Dean Moore.  Alex Rocco is a credited guest voice as Roger Meyers, Jr. for the third and final time (having previously provided the character's voice in "Itchy & Scratchy & Marge" and "The Day the Violence Died"); Phil Hartman also guest stars as Troy McClure.  Poochie would become a minor recurring character and Comic Book Guy's catchphrase, "Worst episode ever", is introduced in this episode.  With "The Itchy & Scratchy & Poochie Show", the show's 167th episode, "The Simpsons" surpassed "The Flintstones" in the number of episodes produced for a prime-time animated series. "I Married Marge" is the twelfth episode of "The Simpsons"<nowiki>'</nowiki> third season.  It originally aired on the Fox network in the United States on December 26, 1991.  In the episode, Marge worries that she may yet again be pregnant and drives to Dr. Hibbert's office.  While anxiously waiting, Homer begins to tell Bart, Lisa, and Maggie the story of how he and Marge got married and how Bart was born. "Three Gays of the Condo" is the seventeenth episode of the fourteenth season of "The Simpsons".  It originally aired on the Fox network in the United States on April 13, 2003.  The episode was written by Matt Warburton and directed by Mark Kirkland.  The title is a pun on the 1975 film "Three Days of the Condor".  In the episode Homer finds out that while dating, Marge did not enjoy going to Moe's Tavern while Homer got drunk.  Homer notices two days later that Marge is pregnant with Bart, so he thinks that is why she stayed with him.  Upset, Homer moves in with two gay guys, Grady and Julio. "Marge in Chains" is the 21st episode of "The Simpsons"<nowiki>'</nowiki> fourth season.  It originally aired on the Fox network in the United States on May 6, 1993.  In the episode, Marge is arrested for shoplifting after forgetting to pay for an item at the Kwik-E-Mart.  The family hires attorney Lionel Hutz to defend her at trial, but she is found guilty and sentenced to 30 days imprisonment.  Homer, and the rest of the family have trouble coping without Marge.  The townspeople start a riot when an annual bake sale missing Marge fails to raise enough money for a statue of Abraham Lincoln and they have to settle for a statue of Jimmy Carter.  Mayor Quimby has Marge released from jail in order to save his career and quell the riot. "The Way We Was" is the twelfth episode of "The Simpsons"<nowiki>'</nowiki> second season.  It originally aired on the Fox network in the United States on January 31, 1991.  In the episode, Marge tells the story of how she and Homer first met and fell in love.  Flashing back to 1974, we see how Homer falls in love with Marge in high school and tries to get close to her by enlisting her as his French tutor.  After several hours of verb conjugation, Marge falls for Homer too, only to become enraged when he admits that he is not a French student.  Marge rejects Homer's invitation to the prom and goes with Artie Ziff.  Artie turns out to be a terrible date and Marge realizes that it is Homer she really wants. "The War of the Simpsons" is the twentieth episode of "The Simpsons"<nowiki>'</nowiki> second season.  It originally aired on the Fox network in the United States on May 2, 1991.  In the episode, Homer gets drunk at a party and embarrasses his wife Marge, so she decides to sign them up for a marriage counseling retreat.  Homer finds out that the retreat will be held near a lake and packs his fishing equipment, despite Marge telling him that all they will be doing is resolving their differences.  At the lake the next morning, Homer tries to sneak away to go fishing, but Marge catches him and he takes a walk instead.  On the dock, Homer grabs hold of a fishing pole only to be yanked onto a small rowboat by the fish.  When he notices an upset Marge is looking at him, he immediately lets the fish go to prove his love for her.
Answer: Dr. Hibbert