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{{Infobox/Yu-Gi-Oh!/Charactercharacter | image name = ClarkClarkSmith.jpgpng | image size = 320px | japanese name ja_name = クラーク・スミス | romaji name romaji_name = | english name en_name = Clark Smith | anime debut anime_debut = {{episode|Yu-Gi-Oh! 5D's|116|ref}} | appears anime appears_in_anime = ''[[Yu-Gi-Oh! 5D's]]'' | gender = maleMale | affiliation organization = * [[YliasterMomentum Express]]* [[Iliaster]] | | previous occupation previous_occupation = President of [[Momentum Express]] | anime deck anime_deck = [[Geometric Knight]] | japanese voice ja_voice = {{Voice actors|ja|Manabu Sakamaki}} | english voice =

 '''Clark Smith''' is the President of the [[Momentum Express]] company. He is affiliated with [[YliasterIliaster]] and is responsible for having [[Dr. LeBlanc]] murdered. (However, it is heavily implied by and his [[Sherry LeBlancMrs. Leblanc|Sherrywife]] that he didn't do it himself, but simply "allowed" it to happenmurdered.)

[[File:Clark_Smith.png|thumb|left|Linework.]]Clark meets met [[Yusei Fudo]], [[Sherry LeBlanc]] and [[Bruno]] , disguised as their pretending to be employees from [[Bolten]]'s company.Thus at He denied meeting Sherry before, when she expressed curiosity over this. He showed them a riding course, used in the testing of a new engine and the "[[Infinity (machine)|Infinity]]" machine. Yusei, Sherry and Bruno swiped the access key to Infinity from Clark's office, but he returned before they had timeto escape. Yusei waited for Clark, giving Bruno and Sherry strangely asks time to sneak out.[[File:Glowing-Cards.png|thumb|right|Clark Smith's marked cards.]]Yusei imposed a [[Duel]], which Clark accepted under the conditions that it be a [[Concentration Duel]] and the winner takes their opponent's [[Deck]] as a prize. With no other option, Yusei accepted and Clark allowed him if they have met beforeto go first, however giving him time to gain familiarity with the rules. Clark denies thischeated by having his cards marked in a way that was visible in their reflection on his glasses. He managed to send most of Yusei's cards to the [[Graveyard]]. However Yusei caught on to his trick and used it to his advantage in his last move, winning the Duel.

He Clark admitted that he knew who Yusei was from the beginning and activated a security alarm. Yusei, Bruno and Sherry fell for Clark's trap as they tried to hide in a [[dimension shuttle]], which Clark then guides used to send them to where the riding course is located for the test of through a new enginewormhole created by Infinity. Along Before the wayshuttle was launched, Sherry realized that Momentum Express must be connected to [[Iliaster]] and asked Clark shows them ", who killed her father, [[Infinity (machine)|InfinityDr. LeBlanc]]" . Clark explained Dr. LeBlanc's involvement in Infinity and explains what the machine doesblamed his death on him asking too many questions.

After Yusei and co. obtains When the access key from his office to enter where Infinity is, Clark appears shortly but not before Sherry and Bruno sneak out, thus Yusei waits for Clark in there in order to stalk for time.  To do so, Yusei tells him that he wants to have a [[DuelThree Emperors of Iliaster]] against him. To this found out what Clark acceptshad done, however he tells Yusei that some conditions will be used on their duel. One is that they will be playing a "[[Concentration Duel]]" in which Clark explains the rules of the game. The other condition is were displeased that the winner also wins its opponents [[Deck]].  Yusei who has no option accepts his condition. Thus the duel starts with Clark letting Yusei go first, letting him the advantage of beginning due to the unfamiliarity with the rules.  Clark however, is cheating in the duel by remembering the placements of his cards and identify them through his glasses. Because of this, he is able attempted to [[send]] most of eliminate Yusei's cards to the [[Graveyard]]. Still, Yusei is able to see his through his trick and ultimately wins the duel. Clark not only admits defeat but also reveals that he knows who Yusei is from the beginning. Clark [[activate]]s the alarm and Yusei flees to meet with his friends, however as there escaping from the company's security they enter was a shuttle which actually turns useful pawn to be a trap set by Clark. As he their plans to use it to send them through a wormhole created by Infinity. Before the shuttle is fired through InfinityConsequently, Clark talks to them saying that it was easy for them to fall into his trap. Sherry then realizes that such an act could only mean that he may be aware they performed a [[falsification of knowing who killed her parents. Clark then reveals about Dr. LeBlanc's relationship with Infinity.  Clark says that Dr. LeBlanc created the cards to complete the machine. But he asked too many questions about its usage and once he realised that the device could be used by Yliaster to change history]], he had to be disposed of.  Later, erasing the [[Three Emperors existence of Yliaster]] find out what he has done Clark and berate him heavily for attempting to eliminate such a useful pawn in their plans (Yusei) and he is erased alongside anything related to [[Momentum Express]].

{| style="float:right;" border="1" width="30%"! colspan="3" style="background: #00FF00; text-align: center;" | Record|-| Clark uses a '''Opponent[[Geometric Knight]] [[Deck]]''' || '''Outcome'''|-| with a [[Yusei FudoMill Deck|mill]] || Lose|sub-|} Clark theme, which he uses to abuse the special conditions of a [[Geometric Knight]] [[DeckConcentration Duel]]to gain advantage over his opponent.

|effect monsters =<u>Effect Monsters</u>