Guest Star :: Ryan Phuong
Ryan Phuong has guest starred in 31 episodes of Young Sheldon.
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102. Rockets, Communists, and the Dewey Decimal System as Tam
Aired November 2, 2017
When Sheldon goes to the school library to return a self-help book on making friends, he strikes up a conversation with Tam, who is also in to rocketry. On the suggestion of his mother, Sheldon invites Tam to dinner.
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104. A Therapist, a Comic Book, and a Breakfast Sausage as Tam
Aired November 16, 2017
After Sheldon belittles Tam's interest in comic books, he is surprised to see Sheldon at the comic book store.
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105. A Solar Calculator, a Game Ball, and a Cheerleader's Bosom as Tam
Aired November 23, 2017
When Sheldon improves the fortunes of the school's football team, his wave of popularity raises Tam's boat as well.
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106. A Patch, a Modem, and a Zantac as Tam
Aired November 30, 2017
Tam goes to find Sheldon when he doesn't show up for math class.
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109. Spock, Kirk, and Testicular Hernia as Tam
Aired December 21, 2017
After Tam tells Sheldon that Georgie cheated on his math test, Tam is surprised when Sheldon picks up the art of deception.
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110. An Eagle Feather, a String Bean, and an Eskimo as Tam
Aired January 4, 2018
Tam stoically handles the news that his best friend Sheldon is moving to a school in Dallas.
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111. Demons, Sunday School, and Prime Numbers as Tam
Aired January 11, 2018
During Sheldon's quest to research other religions, he asks Tam about his Catholic faith.
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113. A Sneeze, Detention, and Sissy Spacek as Tam
Aired February 1, 2018
After Sheldon's teacher sneezes in class he decides to brave the school's punishment and skip class in a bid to avoid catching the flu. As more and more people appear to be sick, Sheldon's fear of the flu rises and he takes extreme measures to insulate himself from illness.
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114. Potato Salad, a Broomstick, and Dad's Whiskey as Tam
Aired March 1, 2018
After Mary takes a job at the local church, Sheldon and Missy spend their first afternoon home alone. On Mary's first day on the job she finds herself becoming a marriage counselor to Pastor Jeff.
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115. Dolomite, Apple Slices, and a Mystery Woman as Tam
Aired March 8, 2018
When Sheldon makes friend with an older girl who introduces him to a new field of science, Mary and George are conflicted on how to handle Sheldon's maturing social life.
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117. Jiu-jitsu, Bubble Wrap, and Yoo-hoo as Tam
Aired April 5, 2018
When Sheldon decides to learn self-defense, he turns to Tam for help learning jui-jitsu.
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118. A Mother, a Child, and a Blue Man's Backside as Tam
Aired April 12, 2018
Tam is at the comic book store with Sheldon when Mary storms and confronts the owner about an inappropriate comic book.
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201. A High-Pitched Buzz and Training Wheels as Tam
Aired September 24, 2018
When Sheldon is plagued by an irritating noise coming from the refrigerator, he asks Tam if he knows anything about surviving psychological torture.
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204. A Financial Secret and Fish Sauce as Tam
Aired October 11, 2018
Finding it difficult to keep a secret from his mother, Sheldon decides to get away by having a sleepover at Tam's house.
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206. Seven Deadly Sins and a Small Carl Sagan as Tam
Aired October 25, 2018
Tam joins Sheldon, Missy and Billy as they go trick-or-treating in the neighborhood.
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209. Family Dynamics and a Red Fiero as Tam
Aired November 15, 2018
Tam gives a presentation in the psychology class after observing his mom and dad working in their store over Thanksgiving holiday.
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210. A Stunted Childhood and a Can of Fancy Mixed Nuts as Tam
Aired December 6, 2018
Sheldon discusses with Tam an article in Psychology Magazine about a stunted childhood leading to maladjustment later in life.
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211. A Race of Superhumans and a Letter to Alf as Tam
Aired January 3, 2019
As Sheldon plots to create a race of superhumans, he discusses Socrates' thoughts on knowledge with Tam.
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213. A Nuclear Reactor and a Boy Called Lovey as Tam
Aired January 17, 2019
Tam notices that Georgie looks upset in the school hallway.
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214. David, Goliath and a Yoo-hoo from the Back as Tam
Aired January 31, 2019
When he Sheldon and examine a fossil in science class, Tam breaks it to pieces.
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216. A Loaf of Bread and a Grand Old Flag as Tam
Aired February 21, 2019
When Sheldon and Tam eat lunch in the school library, Sheldon detects something wrong with his sandwich.
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219. A Political Campaign and a Candy Land Cheater as Tam
Aired April 25, 2019
When Sheldon gets tired of school funds going to the football program rather than the science department, he decides to run for class president.
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222. A Swedish Science Thing and the Equation for Toast as Tam
Aired May 16, 2019
Sheldon talks to Tam about which foods to serve at his Nobel Prize ceremony party.
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302. A Broom Closet and Satan's Monopoly Board as Tam
Aired October 3, 2019
Sheldon regrets telling Tam about his secret study place.
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303. An Entrepreneurialist and a Swat on the Bottom as Tam
Aired October 10, 2019
Tam is puzzled when Sheldon turns to him for advice on a social situation.
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307. Pongo Pygmaeus and a Culture that Encourages Spitting as Tam
Aired November 14, 2019
Sheldon shows Tam how to get on the Internet and join a Usenet group.
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318. A Couple Bruised Ribs and a Cereal Box Ghost Detector as Tam
Aired March 12, 2020
As Sheldon and Tam play with model trains in the garage, Tam discusses parenting styles in Vietnamese culture.
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319. A House for Sale and Serious Woman Stuff as Tam
Aired April 2, 2020
When they eat lunch in the school library, Tam wonders why Sheldon is reading about the property code.
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401. Graduation as Tam
Aired November 5, 2020
Sheldon breaks the news to Tam that he'll be leaving for college.
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412. A Box of Treasure and the Meemaw of Science as Tam
Aired April 1, 2021
Georgie sells one of Sheldon's old tests to Tam.
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415. A Virus, Heartbreak and a World of Possibilities as Tam
Aired April 22, 2021
Sheldon is caught in a moral dilemma when offered a bootleg copy of a computer game he can't afford. Also, Mary and Meemaw take Brenda out for girls' night while George Sr. and the guys watch Billy, and Missy asks Georgie to take her and Marcus on a secret date.