In “Girls,” Shoshanna (Zosia Mamet) is let in on a secret involving Marnie. She has to decide whether telling Ray (Alex Karpovsky) is the best thing to do. (Mark Schafer/HBO)

In an intensely depressing sign of the times, the Lifetime Network brings us a made-for-TV movie about a college student who decides to serve as a surrogate for a wealthy couple to pay for tuition. “Sorority Surrogate” (8 p.m.) stars Cassie Steele as Valerie, whose story gets sadder and more complex when the couple is tragically killed and she is then forced into a nasty custody battle with the unborn baby’s grandmother.

RETURNING SHOW: The part-historical, part-fantasy series “Da Vinci’s Demons” (Starz at 9) opens its second season with chaos in the streets while Leonardo is forced to gamble for the future of Florence.

For a change of pace, John Leguizamo puts on a one-man stage performance of the story of his life on his special “Ghetto Klown” (HBO at 10).

Sunday talk shows: “Platts Energy Week” (WUSA at 8 a.m.) interviews Federal Energy Regulatory Commission chief Cheryl Lafleur; “BioCentury This Week” (WUSA at 8:30) features American Society of Clinical Oncology’s Richard Schilsky; “Fox News Sunday” (Fox at 9) hosts Rep. Michael McCaul (R-Tex.); “White House Chronicle” (WETA at 9) has Nuclear Infrastructure Council’s David Blee; “State of the Union” (CNN at 9) features Rep. Patrick Meehan (R-Pa.).

“Government Matters” (WJLA at 9:30) hosts Wall Street Journal’s Gautham Nagesh; “This Week” (ABC at 10) features FiveThirtyEight’s Nate Silver; “Newsmakers” (C-SPAN at 10) talks to America’s Health Insurance Plans’s Karen Ignagni; “This Is America & the World” (WETA at 10 and WHUT at 6 p.m.) talks to The Washington Post’s David Finkel; “Meet the Press” (NBC at 10:30) has Rep. Mike Rogers (R-Mich.); “Face the Nation” (CBS at 10:30) talks to former GOP presidential candidate Mitt Romney.

SERIES PREMIERE: Sunday night, America’s top designers, builders, architects and landscapers go head-to-head each week, putting their talents to the test on extreme home renovations on the reality show “American Dream Builders” (NBC at 8 p.m.). Interior designer Nate Berkus is the host.

RETURNING SHOW: “Drop Dead Diva” (Lifetime at 9) is back for its sixth season with Jane taking a pro bono case for a lunch lady.

Faith becomes a viable form of defense for those still surviving on “The Walking Dead” (AMC at 9).

FINALE WATCH: For a different vibe entirely, the “Girls” (HBO at 10) world is falling apart in the Season 3 finale when Shoshanna is let in on a detrimental secret from Marnie, and Jessa realizes her employer hired her just so she could get drugs.

— Rachel Lubitz