Jim O'Heir, Simon Baker

Ever imagined what a Parks and Recreation crossover with The Mentalist might look like? This could be as close as you'll ever get.

Parks mainstay Jim O'Heir will guest-star on the upcoming Season 5 premiere of The Mentalist, TVGuide.com has learned exclusively.  O'Heir will play a hotel manager who may have some valuable information to offer Patrick Jane (Simon Baker) and his team about their latest investigation.

The Mentalist lands new FBI agent

O'Heir will join Rome veteran Polly Walker, who was recently cast as a quick-witted FBI agent who will recur during The Mentalist's fifth season.

Besides his work on Parks as the oft-mocked but incredibly well-endowed Jerry, O'Heir, 50, has made guest appearances on such shows as Parenthood, Just Shoot Me and ER.

The Mentalist premieres Sunday, Sept. 30 at 10/9c on CBS. Parks and Recreation's fifth season begins Thursday, Sept. 20 at 9:30/8:30c on NBC.