BYUtv's rather ambitious effort to make a name for itself with its first scripted drama, Granite Flats, ends its first season on Sunday (6 and 9 p.m.) - and the kids face real danger at the school science fair.Friday on TV ...College baseball (6 p.m., BYUtv): St. Mary's at BYUUndercover Boss (7 p.m., CBS/Ch. 2): Bosses from past episodes reveal how the show affected their businesses and their lives. (Season finale)Nikita (7 p.m., CW/Ch. 30): Nikita must choose between saving Michael or herself. (Season finale)Great Performances at the Met (8 p.m., PBS/Ch. 7): The Metropolitan Opera performs Verdi's ''Rigoletto" - a new production that moves the setting of the story to the Las Vegas strip circa 1960.Merlin (8 and 10 p.m., Syfy): Mordred returns to the dark side.Da Vinci's Demons (10 p.m., Starz): Leonardo encounters Vlad Dracula.Saturday on TV ...College baseball (1 p.m., BYUtv): St. Mary's at BYUHorse racing (2:30 p.m., NBC/Ch. 5): The 138th Preakness Stakes. (Post time is approximately 4:20 p.m.)AFL (7 p.m., Ch. 14): Iowa Barnstormers at Utah BlazeOrphan Black (7 and 10 p.m., BBC America): Sarah's actions pit the Orphans against each other.Rock and Roll Hall of Fame Induction Ceremony (10 p.m., HBO): Lou Adler, Heart, Quincy Jones, Albert King, Randy Newman, Public Enemy, Rush and Donna Summer, are inducted.Saturday Night Live (10:30 p.m., Ch. 30): Ben Affleck hosts; Kanye West performs. (Season finale)Hannibal (midnight, Ch. 30): Hannibal learns a killer acted to gain his attention.Sunday on TV ...60 Minutes (6 p.m., CBS/Ch. 2): For a report on Michael Jackson's lucrative legacy, we get a look at the incredible and bizarre collection of possessions he left behind.Billboard Music Awards (7 p.m., ABC/Ch. 4): Tracy Morgan hosts. (Tape-delayed)Call the Midwife (7 p.m., PBS/Ch. 7): The convent is threatened by developers. (Season finale)The Simpsons (7 p.m., Fox/Ch. 13): Homer, Moe, Lenny and Carl win the lottery, (Season finale)Mad Men (7, 9:04 and 10:08 p.m., AMC): Don gets a surprise visit.Army Wives (7 and 11 p.m., Lifetime): The men return from Afghanistan.Tim McGraw's Superstar Summer Night (8 p.m., CBS/Ch. 2): McGraw performs with Jason Aldean, Luke Bryan, Taylor Swift, Ne-Yo, Bentley, Keith Urban, Lady Antebellum, Pitbull, John Fogerty, Faith Hill, Florida Georgia Line, Nelly and The Band Perry.All-Star Celebrity Apprentice (8 p.m., NBC/Ch. 5): A winner is chosen in the season finale of this dopey show.Masterpiece Classic (8 p.m., PBS/Ch. 7): In Part 8 of "Mr. Selfridge," polar explorer Ernest Shackleton arrives; tragedy strikes.Family Guy (8 p.m., Fox/Ch. 13): Stewie's time machine malfunctions. (Season finale)The Client List (8 p.m., Lifetime): Linette struggles in rehab.MLS (8:30 p.m., Ch. 30): Real Salt Lake at Chivas USAGame of Thrones (10 p.m., HBO): There's a royal wedding at King's Landing.Nurse Jackie (10 and 10:30 p.m., Showtime): Jackie and Grace try to live down their latest mistakes.Veep (11 p.m., HBO): Selina sees her ex-husband.The Borgias (11 p.m., Showtime): Catherina sends a plague-infested cloth to Alexander,Family Tree (11:30 p.m., HBO): Tom and Pete learn about Harry's life.