River Monsters (8pm, Animal Planet) - Jeremy's search for the Loch Ness monster takes him to the depths of the Scottish lake and the volcanoes of Iceland in the two-hour fifth season finale.
The Bachelorette (8pm, NBC) - The ninth season kicks off with Desiree Hartsock (left, with host Chris Harrison) moving into a Malibu estate and meeting 25 potential suitors, three of whom will actually be reasonable matches for her. Before the night is done, the field is pared to 19 men.
Hit the Floor (9pm, VH1) - The lives of a professional Los Angeles basketball team's female dance squad are charted in this new drama series starring Taylour Paige, Dean Cain and Charlotte Ross.
The Glades (9pm, A&E) - In the Season 4 premiere, an heiress's dead body is found in a plantation house.
Longmire (10pm, A&E) - Season 2 opens with a botched prison transfer leading to a hostage situation. So happy to have Sheriff Walt back for summer TV viewing!
Revolution (10pm, NBC) - Monroe faces off with Rachel, and later deals with Miles after Miles and crew manage to get inside the Tower.
Bringing Up Baby: Royal Edition (10pm, ABC) - ABC continues its excessive fawning over the soon-to-be-born baby of Prince William and Catherine, the Duchess of Cambridge. Barbara Walters uses this "Special Edition of 20/20" to examine the expectations facing the baby, royal nanny training, and the baby's grandparents.