In the first-season finale of Murder In the First (8 and 10 p.m., TNT), Terry and Hildy unearth some shocking secrets.How better to end a season than a few shocking secrets?By the way, we're still waiting to hear if there will be a Season 2 for this show.Elsewhere on TV ...Bachelor in Paradise (7 p.m., ABC/Ch. 4): Turns out one of the contestants had an affair with a crew member. Classy show here.Running with Bear Grylls (7 p.m., NBC/Ch. 5): Channing Tatum and Bear trek through California's Yosemite National Park.MasterChef (7 p.m., Fox/Ch. 13): The remaining 10 contestants prepare healthy menus for football fans.Whose Line Is It Anyway? (7 p.m., CW/Ch. 30): Padma Lakshmi and Heather Anne Campbell are the guests.Major Crimes (7 and 9 p.m., TNT): Young women are vanishing from a nightclub.Hotel Hell (8 p.m., Fox/Ch. 13): A Mississippi hotel is on the verge of failing.Under the Dome (9 p.m., CBS/Ch. 2): Barbie discovers a new world when he descends further into the mysterious tunnel.Mistresess (9 p.m., ABC/Ch. 4): April learns who her stalker is.Switched at Birth (9 p.m., ABC Family): Bay isn't sure she wants to attend the prom when she learns about the new dress code.The Fosters (10 p.m., ABC Family): Mat's soffends Mariana and Callie has a confrontation that triggers a relapse of her panic attacks.Partners (10 and 10:30 p.m., FX): Marcus is wrongfully accused of stealing; Marcus' mother bonds with Allen.Teen Wolf (11 p.m., MTV): Scott carries out a dangerous plan.