"Shark Girl" (8 p.m., Smithsonian): This new series follows 20-year-old Madison Stewart, who feels totally comfortable diving into shark-infested waters. Since childhood, growing up by the Great Barrier Reef, she's treated these predators as family. Now, she's on a mission to protect them.
"Game of Thrones" (9 p.m., HBO): From King Joffrey's ill-fated wedding and the gruesome trial by combat, to last week's mammoth clash on the Wall, Season 4 of this epic fantasy has been packed with jaw-dropping, mind-blowing moments. Now comes the season finale. Can the show top itself once again? We'd bet Tyrion's (Peter Dinklage) life on it.
"The Escape Artist" (9 p.m., PBS): David Tennant, who earned rave reviews for his work in "Doctor Who" and "Broadchurch," shines once again in this two-part "Masterpiece Mystery!" The thriller has him playing a defense lawyer known for being a legal Houdini.
Also on Sunday: