Robert John Downey Jr. (born April 4, 1965) is an American actor who made his screen debut in 1970 at the age of five, appearing in his father's film Pound, and has worked consistently in film and television ever since. During the 1980s, he had roles in series such as coming of age films associated with the Brat Pack. His role in Less Than Zero (1987) was the first time Downey's acting would be commended by critics. After Zero, Downey was cast in starring roles in bigger films, such as Air America (1990), Soapdish (1991), and Natural Born Killers (1994). He played Charlie Chaplin in the 1992 film Chaplin, for which he received an Academy Award nomination for Best Actor.

Between 1996 and 2001, Downey was frequently arrested on drug-related charges. After being released from the California Substance Abuse Treatment Facility and State Prison in 2000, Downey joined the cast of the hit television series Ally McBeal playing the new love interest of Calista Flockhart's title character. His performance was praised and received accolades, but his character was written out when Downey was fired after two drug arrests in late 2000 and early 2001. After one last stay in a court-ordered drug treatment program, Downey finally achieved lasting sobriety and his career began to take off again. He appeared in semi-independent films such as The Singing Detective (2003), Kiss Kiss Bang Bang (2005), and A Scanner Darkly (2006). He also had supporting roles in the mainstream films Gothika (2003) and Zodiac (2007). In 2004, Downey released his debut studio album The Futurist.

Sherlock Holmes ( /ˈʃɜrlɒk ˈhoʊmz/) is a fictional detective created by Scottish author and physician Sir Arthur Conan Doyle. The fantastic London-based "consulting detective", Holmes is famous for his astute logical reasoning, his ability to adopt almost any disguise, and his use of forensic science skills to solve difficult cases.

Holmes, who first appeared in publication in 1887, was featured in four novels and 56 short stories. The first novel, A Study in Scarlet, appeared in Beeton's Christmas Annual in 1887 and the second, The Sign of the Four, in Lippincott's Monthly Magazine in 1890. The character grew tremendously in popularity with the first series of short stories in Strand Magazine, beginning with A Scandal in Bohemia in 1891; further series of short stories and two novels published in serial form appeared between then and 1927. The stories cover a period from around 1880 up to 1914.

All but four stories are narrated by Holmes's friend and biographer, Dr. John H. Watson; two are narrated by Holmes himself ("The Blanched Soldier" and "The Lion's Mane") and two others are written in the third person ("The Mazarin Stone" and "His Last Bow"). In two stories ("The Musgrave Ritual" and "The Gloria Scott"), Holmes tells Watson the main story from his memories, while Watson becomes the narrator of the frame story. The first and fourth novels, A Study in Scarlet and The Valley of Fear, each include a long interval of omniscient narration recounting events unknown to either Holmes or Watson.

Eugene Levy, CM (born December 17, 1946) is a Canadian actor, comedian, and writer. He is known for his work in Canadian television series, United States movies, and television movies. He is the only actor to have appeared in all eight of the American Pie films, as Noah Levenstein. Levy was appointed to the Order of Canada on June 30, 2011.

Levy was born to a Jewish family in Hamilton, Ontario. His father was a foreman in an automobile plant. He went to Westdale Secondary School, and attended McMaster University. He was vice-president of the McMaster Film Board, a student film group where he met moviemaker Ivan Reitman.

He began his career as a comedian in the sketch comedy series Second City Television. An alumnus of both Second City Toronto and the sketch comedy series SCTV, Levy often plays unusual supporting characters with nerdish streaks. Perhaps his best known role on SCTV was as the dimwitted Earl Camembert, a news anchor for the "SCTV News" and a parody of real-life Canadian newsman Earl Cameron. Celebrities impersonated by Levy on SCTV include: Perry Como, Ricardo Montalban, Alex Trebek, Sean Connery, Howard Cosell, Henry Kissinger, Menachem Begin, Bud Abbott, Milton Berle, John Charles Daly, Gene Shalit, Jack Carter, Muammar al-Gaddafi, Tony Dow, James Caan, Lorne Greene, Rex Reed, Ralph Young (of Sandler and Young), F. Lee Bailey, Ernest Borgnine, former Ontario chief coroner Dr. Morton Schulman, Norman Mailer, Neil Sedaka, and Howard McNear as “Floyd the Barber”.

Jennifer Coolidge (born August 28, 1961) is an American actress best known for playing "Stifler's mom," the MILF in the film American Pie (1999); Hilary Duff's stepmother in A Cinderella Story (2004); Paulette, the manicurist in Legally Blonde (2001) and its sequel; the voice of Aunt Fanny in the animated feature Robots (2005); for her role in The Secret Life of the American Teenager as Betty; and for her regular role in the NBC sitcom Joey as Joey's agent, Bobbie Morganstern. She is also a regular actor in Christopher Guest's mockumentary films. Coolidge is an alumna of The Groundlings, an improv and sketch comedy troupe based in Los Angeles, CA. Currently she has a supporting role in 2 Broke Girls as Sophie.

Coolidge was born in Boston, Massachusetts, the daughter of Gretchen (née Knauff) and Paul Constant Coolidge, a plastics manufacturer. She was raised in Norwell, Massachusetts, and has a brother, Andrew, and two sisters, Elizabeth and Susannah. Coolidge attended Norwell High School, the Cambridge School of Weston, Emerson College in Boston and the American Academy of Dramatic Arts in New York City. Her charitable work has included a history of supporting AIDS assistance and animal rights.

Peter Facinelli (pronounced fah-CHIN-elly; born November 26, 1973) is an American actor. He became known as the star of Fox's 2002 television series Fastlane. He plays Carlisle Cullen in the film adaptations of the Twilight series. He is also well known for his role as Mike Dexter in the film Can't Hardly Wait. He is currently a regular on the television series Nurse Jackie portraying the role of Dr. Fitch "Coop" Cooper.

Facinelli grew up in Ozone Park, Queens, the son of Italian immigrants, Bruna (née Reich), a homemaker, and Pierino Facinelli, a waiter. His parents are from Val di Non which is located in Trentino, Northern Italy. His father is from Revò, while his mother is from Spormaggiore. He was raised Roman Catholic and attended St. Francis Preparatory School in Fresh Meadows, New York. He studied acting at New York University, as well as at the Atlantic Theater Company Acting School in New York City; his teachers there included William H. Macy, Felicity Huffman, Giancarlo Esposito, and Camryn Manheim.