The Tonight Show Starring Jimmy Fallon (11 p.m., NBC/Ch. 5) debuts tonight, hoping to get a boost from the Olympics.It's also later than it will normally be because of the Olympics. Once the Games end, Fallon & Co. will air in the traditional 10:35 p.m. time slot.Elsewhere on TV ...The Bachelor (7 p.m., ABC/Ch. 4): Juan and the remaining women go on an adventure.Almost Human (7 p.m., Fox/Ch. 13): A designer drug kills two genetically enhanced children.Hart of Dixie (7 p.m., CW/Ch. 30): Zoe's mother makes a surprise appearance at Zoe's birthday party.Being Human (7 and 10 p.m., Syfy): Sally discovers she has new powers.The Following (8 p.m., Fox/Ch. 13): Max and Ryan try to stay ahead of the FBI.Lost Girl (8 and 11 p.m., Syfy): Bo's search for answers turns dangerous.Intelligence (9 p.m., CBS/Ch. 2): There's a deadly virus outbreak in Texas.Switched at Birth (9 p.m., ABC Family): Bay thinks Tank has a crush on her.The Fosters (10 and 11 p.m., ABC Family): Painful memories haunt Callie.Teen Wolf (11 p.m., MTV): Stiles disappears.