Duncan Kane

Duncan Kane is a fictional character on the UPN television series Veronica Mars, which debuted during the fall 2004 season. He is portrayed by Teddy Dunn. He is Veronica's ex-boyfriend, and the brother to her dead best friend, Lilly Kane. His father, Jake Kane, invented streaming video.

In "The Girl Next Door", it was confirmed that Duncan had broken up with Veronica before his sister died. Previously, some viewers had speculated that the breakup occured after Lilly's death. The end of "Like a Virgin" included a statement by Abel Koontz that Veronica's father might actually be Jake Kane. Since then, many people speculated that Duncan may have broken up with Veronica because he believed her to be his sister. This statement was confirmed during "A Trip to the Dentist", which is also the episode in which we find out that Duncan had slept with Veronica while they were both unwillingly drugged.