Peter Gallagher, American actor
Peter Killian Gallagher is an American actor. Since 1980, he has played roles in numerous Hollywood films. He is best known for starring as Sandy Cohen in the television drama series The O.C. from 2003 to 2007, recurring roles such as Deputy Chief William Dodds on Law & Order: Special Victims Unit, Stacey Koons on the Showtime comedy-drama Californication, and Nick on the Netflix series Grace & Frankie. He also played CIA Director of Clandestine Services (DCS) Arthur Campbell on Covert Affairs.

1955Aug, 19
Peter Gallagher
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Events on 1955
- 7Jan
Metropolitan Opera
Contralto Marian Anderson becomes the first person of color to perform at the Metropolitan Opera in Giuseppe Verdi's Un ballo in maschera. - 13Feb
Dead Sea Scrolls
Israel obtains four of the seven Dead Sea Scrolls. - 18Feb
Nevada Test Site
Operation Teapot: Teapot test shot "Wasp" is successfully detonated at the Nevada Test Site with a yield of 1.2 kilotons. Wasp is the first of fourteen shots in the Teapot series. - 14May
Warsaw Pact
Cold War: Eight Communist bloc countries, including the Soviet Union, sign a mutual defense treaty called the Warsaw Pact. - 11Jun
1955 Le Mans disaster
Eighty-three spectators are killed and at least 100 are injured after an Austin-Healey and a Mercedes-Benz collide at the 24 Hours of Le Mans, the deadliest ever accident in motorsports.