 Oliver appeared in the series' first season as a thorn in Ryan Atwood and Marissa Cooper's relationship, soon developing a severe obsession with the latter.After holding Marissa captive at gunpoint in his penthouse, Oliver was arrested and sent to a rehabilitation clinic.Oliver was created by Josh Schwartz, whose concept for the character was "based on a guy...a friend of mine dated who faked having cancer to [hang on to her]."