Parents: Andrew and Cassandra Summerfield

Relationships: Summer Solomon

Appearances: Season 5

Who’d Play Him: Corey Monteith

The Gentleman with a Gun: Duke Summerfield was the privileged son of the American ambassador to Switzerland and a former boarding school roommate of Benji Rydell. Impeccably dressed, articulate, and unfailingly courteous around adults, Duke appeared to be the model product of an elite international upbringing. Away from parents and authority figures, however, he was every bit as manipulative, vindictive, and morally reckless as the troubled young people surrounding him.

Duke arrived in Los Angeles while Benji was struggling with Sierra Merteuil’s return to New York. The former classmates immediately reconnected and formed an alliance based on their respective romantic grudges. Duke wanted revenge against drug dealer Jeff Branigan for sleeping with Summer Solomon, with whom Duke had been involved. In return for Benji’s assistance against Jeff, Duke agreed to help remove Sierra’s new boyfriend, Hunt Roberts, from Benji’s path.

Their scheme quickly placed Benji in legal danger. During a confrontation over a motor bike Jeff had won from Duke in a wager, Benji was discovered holding a gun and arrested. The weapon actually belonged to Duke, but he pleaded with Benji to accept responsibility, warning that the truth would provoke the wrath of his powerful father. Benji reluctantly protected his friend and took the fall. Detective Stephanie Callahan ultimately allowed Benji to escape charges, but Duke’s willingness to sacrifice him exposed the selfishness beneath their supposed friendship.

Duke’s relationship with Summer was equally possessive. He viewed Jeff’s involvement with her as a personal humiliation rather than accepting that Summer could make her own choices. What Duke did not initially know was that Benji had also slept with Summer during one of his earlier breakdowns. When he learned that his closest ally had betrayed him with the woman he regarded as his, Duke quietly turned against him.

By the time Sierra returned to Los Angeles with Hunt and a serious drug problem, Duke was no longer interested in helping Benji reunite with her. At Magnum Rainer’s birthday party, he encouraged Summer to do whatever was necessary to prevent Benji and Sierra from finding their way back to one another. Summer responded by falsely claiming that Benji had attacked her, provoking Blake Distefano into punching his best friend.

Duke continued manipulating events from the sidelines as the party descended into tragedy. After Sierra was secretly drugged, Benji confronted Jeff, and their fight ended with Jeff being struck and killed by a car. Although Duke had originally wanted revenge against Jeff, the death did not restore his loyalty to Benji. Instead, he remained determined to punish the friend who had slept with Summer and concealed it from him.

When Suzanne Rogers published Valley of Temptation and threw Benji out, Sierra became one of the few people still willing to comfort him. They made love and planned to meet again, but Duke recognized that Sierra was Benji’s greatest vulnerability. Pretending to offer sincere advice, he convinced Benji that Sierra would be happier without him. A trusting Benji stood her up, believing that walking away was an act of love.

Duke then revealed that he had deliberately manipulated him. Realizing he had been played, Benji raced to Sierra and begged for forgiveness, eventually persuading her to run away with him. Although Duke failed to separate them permanently, his interference deepened the insecurity and mistrust already poisoning their relationship.

Duke represented the darkest side of inherited privilege. His family name, diplomatic connections, and perfect manners allowed him to appear harmless while others absorbed the consequences of his behavior. He let Benji face arrest for his gun, encouraged Summer to make a devastating false accusation, and weaponized Sierra to punish his closest friend. Duke rarely needed to dirty his own hands; he simply understood how to persuade other people to do the damage for him.