On this Earth Day, Mark Ruffalo narrates a documentary questioning fracking, “Dear President Obama” (Viceland, 8 p.m.), directed by Jon Bowermaster, who previously made “The Edge,” “Antarctica 3D” and the similar “Dear Governor Cuomo.”
Ruffalo also co-stars with Zoe Saldana in last year’s “Infinitely Polar Bear” (Starz, 9 p.m.), about a bipolar man, making its premium cable debut.
Cable music networks are shaken by tragedy to return to their roots, as they remember Prince in “Purple Rain” (VH1, noon, 10:30 p.m.), the third and fourth showings of the film they’ll run eight times through Sunday.
Jay Leno guest stars on the fifth season finale of “Last Man Standing” (ABC, 8 p.m.) just in time for the silver anniversary of Mike’s job.
It’s the first season finale for “Dr. Ken” (ABC, 8:30 p.m.) in which Jeff Ross guest stars.
A new standup special “Patton Oswald: Talking for Clapping” (Netflix, streaming) debuts online.
“The Amazing Race” (CBS, 8 p.m.) competes in Bali.
An overly hungry killer on “Grimm” (ABC, 9 p.m.) eats bones and all.
Eliza Dushku joins the cast of “Banshee” (Cinemax, 10 p.m.) as a special agent investigating the murders.
An orgy in ancient Greece and a flash to the future are among the final stops in the finale of the three night “Time Traveling Bong” (Comedy, 10:30 p.m.).
Lawrence Wright, Thomas Middleditch, Charles Cooke, Lesley Stahl and Van Jones are guests on a new “Real Time with Bill Maher” (HBO, 10 p.m.).
The Friday night salute to Judy Garland on Turner Classic Movies continues with “The Harvey Girls” (8 p.m.), “Easter Parade” (10 p.m.), “The Pirate” (midnight), “Summer Stock” (2 a.m.), “In the Good Old Summertime” (4 a.m.) and “Words and Music” (5:45 a.m.).
NBA playoffs include Cleveland at Detroit (ESPN, 7 p.m.), Atlanta at Boston (ESPN2, 8 p.m.) and San Antonio at Memphis (ESPN, 9:30 p.m.).
Stanley Cup playoffs have Philadelphia at Washington (NBC Sports, 7 p.m.), Islanders at Florida (CNBC, 8 p.m.), Minnesota at Dallas (NBC Sports, 9:30 p.m.) and San Jose at Los Angeles (CNBC, 10:30 p.m.).
Baseball has Boston at Houston (MLB, 8 p.m.).
Daytime Talk
Kelly & Michael: Julia Louis-Dreyfus, Erin Andrews. The Talk: Joel Kinsman, Lesley Stahl, Keltie Knight, Carnie Wilson. Ellen DeGeneres: Oprah Winfrey, 5 Seconds of Summer. Wendy Williams: Brooke Shields. The Real: Lauren Singer. Meredith Vieira: Tony Goldwyn (rerun).
Late Talk
Stephen Colbert: Julia Louis-Dreyfus, Nikolaj Coster-Waldau, Sam Morril. Jimmy Kimmel: Chris Evans, Paul Rudd, Sebastian Stan, Anthony Mackie, White Denim (rerun). Jimmy Fallon: Bryan Cranston, Demi Lovato, the Weeknd with Lauryn Hill (rerun). Seth Meyers: Jenni Konner, Lena Dunham, Ashley Greene, Birdy, Brann Dailor (rerun). James Corden: Rosie O’Donnell, Nikki Glaser, Addison Smith (rerun). Carson Daly: Maggie Siff, White Mystery, Jeff Nichols (rerun).