Television characters introduced in 2005

Lillian "Lily" Aldrin (born March 22, 1978) is a fictional character created by Carter Bays and Craig Thomas for the CBS television series How I Met Your Mother, portrayed by American actress Alyson Hannigan. She is the wife of Marshall Eriksen and the best friend of Robin Scherbatsky. Lily is a kindergarten teacher and amateur painter. She is also the only member of the main cast of the series who hasn't appeared in every episode, due to Alyson Hannigan taking time off after giving birth to her first child.

Robin Charles Scherbatsky, Jr. (born July 23, 1980) is a fictional character created by Carter Bays and Craig Thomas for the CBS television series How I Met Your Mother, portrayed by Canadian actress Cobie Smulders.

Dean Winchester is one of the two protagonists from the American drama television series Supernatural. He is portrayed primarily by Jensen Ackles. Other versions of the character having been portrayed by Hunter Brochu (toddler), Ridge Canipe (child), Nicolai Lawton-Giustra (pre-teen), Brock Kelly and Dylan Everett (teen), and Chad Everett (elderly).

Samuel "Sam" Winchester is a fictional character and one of the protagonists of the American drama television series Supernatural along with his older brother, Dean. He is portrayed primarily by Jared Padalecki.

Michael J. Scofield, played by Wentworth Miller, is a fictional character and one of the two protagonists of the American television series Prison Break. The character first appeared in the series pilot as a man who stages a bank robbery in order to get sent into the prison where his elder brother, Lincoln Burrows (Dominic Purcell), is being held until his execution. The premise of Prison Break revolves around the two brothers and Michael's plan to help Lincoln escape his death sentence. As the principal character, Michael has been featured in every episode of the series. Although both Lincoln and Michael are the main protagonists of the series, Michael has been featured more extensively than Lincoln, especially in the first season and the third.

Derek Christopher Shepherd, M.D., also referred to as McDreamy, is a fictional surgeon from the ABC medical drama Grey's Anatomy, portrayed by actor Patrick Dempsey. He made his first appearance during "A Hard Day's Night", which was broadcast on March 27, 2005. Derek was married to Addison Montgomery (Kate Walsh). He was happily married to longtime girlfriend Meredith Grey (Ellen Pompeo) until his death. Derek was formerly the Chief of Surgery at Seattle Grace Mercy West Hospital, but abruptly resigned as chief in the seventh season following the shooting. For his portrayal of Derek, Dempsey was nominated in 2006 and 2007 Golden Globe for the Best Performance by an Actor in a Television Series Drama for the role, and the 2006 SAG Award for the Outstanding Performance by an Actor in a Drama Series award.

Alexander "Alex" Michael Karev, M.D. is a fictional character on the ABC television series Grey's Anatomy, portrayed by actor Justin Chambers. Introduced as a surgical intern at the fictional Seattle Grace Hospital, Karev eventually obtained the position of resident, later becoming a pediatric surgical fellow. His relationships with colleagues Meredith Grey (Ellen Pompeo), Cristina Yang (Sandra Oh), Izzie Stevens (Katherine Heigl), and George O'Malley (T. R. Knight) formed a focal point of the series.

Isobel Katherine "Izzie" Stevens, M.D. is a fictional character from the medical drama television series Grey's Anatomy, which airs on the American Broadcasting Company (ABC) in the United States. The character was created by series producer Shonda Rhimes, and was portrayed by actress Katherine Heigl from 2005 to 2010. Introduced as a surgical intern at the fictional Seattle Grace Hospital, Izzie worked her way up to resident level, while her relationships with her colleagues Meredith Grey (Ellen Pompeo), Cristina Yang (Sandra Oh), George O'Malley (T.R. Knight) and Alex Karev (Justin Chambers) formed a focal point of the series.

Theodore Evelyn "Ted" Mosby is a fictional character in the U.S. television sitcom How I Met Your Mother, a hopeless romantic portrayed by Josh Radnor. Ted serves as the show's narrator from the future, voiced by Bob Saget, as he tells his children the long version of how he met their mother.

Barnabas "Barney" Stinson is a fictional character portrayed by Neil Patrick Harris and created by Carter Bays and Craig Thomas for the CBS television series How I Met Your Mother. One of the main characters, Barney is a womanizer who uses many 'plays' in his 'playbook' to help him have sex with women. The character is known for his love of wearing expensive suits, laser tag, alcohol and various catchphrases, including "Suit up!", "Legendary", "Wait for it" (often combining the two as "legen—wait for it—dary!"), and "Daddy's home". In later seasons, he has a few serious relationships, marries, divorces, and has a child with an unnamed woman from a one-night stand.