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The Discovery Channel's Shark Week continues tonight with a pair of interesting offerings.
We've got "Island of the Mega-Shark: Sharkopedia Edition" (9 p.m., Discovery), in which a group of shark experts travel to an island off the coast of Mexico in order to research giant white sharks.
And if that's not enough sharking for you, there's "Return of the Great White Serial Killer" (10 p.m., Discovery), in which a series of shark attacks off the coast of California is investigated.
Elsewhere on TV ...
"The Bachelorette" (7 p.m., ABC/Ch. 4): Kaitlyn and the remaining guys travel to Ireland.
"American Ninja Warrior" (7 p.m., NBC/Ch. 5): Qualifying round in San Pedro, Calif..
"So You Think You Can Dance" (7 p.m., Fox/Ch. 13): The call-backs continue.
"Penn & Teller: Fool Us" (7 p.m., CW/Ch. 30): In the Season 2 premiere, four magicians attempt to conjure up confusing illusions.
"Devious Maids" (7 p.m., Lifetime): Zoila struggles with her feelings about having a baby and deals with the arrival of her younger sister; Rosie makes a drastic decision.
"American Geniuses" (7 and 8 p.m., 10 and 11 p.m., National Geographic Channel): "Major Crimes" (7 and 9 p.m., TNT): The team investigates a gangland shooting.
"Whose Line Is it Anyway?" (8 p.m., CW/Ch. 30): Penn and Teller and Gary Anthony Williams are the guests.
"Unreal" (8 p.m., Lifetime): Rachel and Quinn make some questionable decisions to win a bet with Chet.
"Murder In the First" (8 and 10 p.m., TNT): The pressure is on Terry and Hildy to find a cop killer.
"Cedric's Barber Battle" (8:30 p.m., CW/Ch. 30): Barbers from San Francisco, Cleveland and Montreal compete.
"The Whispers" (9 p.m., ABC/Ch. 4): Claire makes a breakthrough; Wes uncovers evidence about Drill's mission.
"The Island" (9 p.m., NBC/Ch. 5): The divide among the men escalates in the Season 1 finale.
"The Fosters" (9 p.m., ABCFamily): An empty pregnancy-test box if found in the house, but who is it who might be pregnant?
"Becoming Us" (10 p.m., ABC Family): Carly meets Kevin's parents at Kevin and Sutton's engagement party.
"Chasing Life" (11 p.m., ABC Famiy): April tries living in the moment as she plans her engagement party. (Season premiere)
"Making of the Mob: New York" (11 p.m., AMC): Lucky Luciano's decision to enter the prostitution business gives Thomas Dewey the chance to arrest him and put him on trial.
"Odd Mom Out" (11 p.m., AMC): Jill receives a frantic call from Brooke, who's in labor.
"Teen Wolf" (11 p.m., MTV): Scott tracks a new shapeshifter that's threatening Stilinski; and Malia receives information about her mother.