One great series ends (for the season); two promising new series debut; and a couple of Utahns race toward a million dollars this weekend.In the two-hour season finale of Downton Abbey (Sunday, 8 p.m., PBS/Ch. 7), the Crawleys get caught up trying to prevent the Prince of Wales from a public scandal.NBC will use the Olympics to launch a pair of sitcoms - both late in the evening and both without commercials. About a Boy (Saturday, 10:07 p.m., Ch. 5) is a really good adaptation of the book and the movie that also carried that titled. Growing Up Fisher (Sunday, 9:38 p.m., Ch. 5) is a winning family comedy about a blind man, his estranged wife and their children. (The two shows move to Tuesday at 8 and 8:30 p.m., respectively.)And Utah father-and-son Dave and Connor O'Leary, who had to drop out of The Amazing Race (Sunday, 7 p.m., CBS/Ch. 2) a year ago when Dave suffered an injury, return to race again in an all-star edition of the show.Friday on TV ...Women's college gymnastics (7 p.m., BYUtv): Southern Utah at BYUGreat Performances (8 p.m., PBS/Ch. 7): Sting performs highlights from his musical play "The Last Ship."NBA (8 p.m., ROOT): Utah Jazz at Portland Trail BlazersHelix (8 and 10 p.m., Syfy): The vectors launch an attack.Saturday on TV ...Men's college basketball: Portland at BYU (7 p.m., BYUtv)Ripper Street (7 p.m., BBC America): In the season premiere, Jackson discovers evidence of a power drug on the streets.NBA (7 p.m., ROOT): Minnesota Timberwolves at Utah JazzBlack Sails (7, 8 and 9 p.m., Starz): Bonny makes a confession.Sunday on TV ...Men's college basketball (6 p.m., ESPNU): Arizona State at Utah60 Minutes (6 p.m., CBS/Ch. 2): Liam Neeson says the sudden death of his wife, Natasha Richardson, still doesn't seem real, even five years after she died in a skiing accident at the age of 45.The Amazing Race (7 p.m., CBS/Ch. 2): A new season begins, and among the all-stars are Utah father and son Dave and Connor O'Leary.The Walking Dead (7, 9 and 10:30 p.m., AMC): Rick has to deal with a number of immediate threats.Winter Olympics (7:30 p.m., NBC/Ch. 5): The Closing CeremonyDownton Abbey (8 p.m., PBS/Ch. 7): In the two-hour season finale, the Crawleys get caught up trying to prevent the Prince of Wales from a public scandal.Sister Wives (9 p.m., TLC): The family celebrates their four marriages.True Detective (10 p.m., HBO): Maggie reveals what happened between Cohle and Hart in 2002.Shameless (10 p.m., Showtime): Fiona is released from jail.Girls (11 p.m., HBO): The group celebrates some good news.House of Lies (11 p.m., Showtime): Roscoe and Lex's relationship becomes a problem.Looking (11:30 p.m., HBO): Patrick is nervous about Richie meeting his friends.Episodes (11:30 p.m., Showtime): Beverly is ready to return to England, but Sean is not.