Peter Hermann displayed his comedic acting chops when he guest-starred on an episode of "30 Rock" titled "The Head and the Hair". Playing the role of "The Hair," Hermann was among the many love interests for lead character Liz Lemon. The episode follows Liz as she goes on a date with Gray, who turns out to be interested in her rather than her friend Jenna. The date takes an unexpected turn, resulting in a shocking discovery.

Hermann's real-life relationship with Mariska Hargitay has been much smoother.