“Pioneers of Television” (WETA at 8 p.m.) explores TV’s fascination with doctors and nurses. Cast members from “ER,” “St. Elsewhere” and “Medical Center” reminisce.
Rachel makes her long-awaited “Funny Girl” debut on “Glee” (Fox at 8).
“Marvel’s Agents of S.H.I.E.L.D.” (ABC at 8) has cello-playing Audrey in danger, and it’s up to Agent Coulson to save her.
Two vocalists are eliminated on “The Voice” (NBC at 8).
In honor of Earth Day, “American Masters: A Fierce Green Fire” (WETA at 9) looks back at 50 years of environmental activism, with Robert Redford, Meryl Streep, Ashley Judd, Van Jones and Isabel Allende as narrators.
RETURNING SHOW: Following a short fishing season, the crew of “Deadliest Catch” (Discovery at 9) rushes to make the market deadline in the Season 10 opener.
Will sees Laurie and Andy’s invitation to game night as an opportunity to see Sam again on “About a Boy” (NBC at 9).
SERIES PREMIERE: Chef Sammy DeMarco and film director Frank Coraci hit the road to find three innovative and delicious twists on comfort food classics in America on “Chow Masters” (Travel Channel at 9). A reward of $10,000 will be given for the best dish.
Mindy butts heads with a police officer when she gives his daughter birth control on “The Mindy Project” (Fox at 9:30).
“Frontline: Solitary Nation” (WETA at 10) examines the United States’ large prison population by looking at the lives of inmates in the solitary confinement unit at a maximum security prison in Maine and the officers who manage the unit.
SERIES PREMIERE: A new romantic comedy series with a twist, “Faking It” (MTV at 10:30) introduces us to Karma and Amy, best friends who are mistakenly outed as lesbians but decide to keep up the ruse for popularity’s sake.
Amy stays at a startlingly luxurious resort and receives therapy from supermodel Chrissy Teigen on “Inside Amy Schumer” (Comedy Central at 10:30).
“The Daily Show With Jon Stewart” (Comedy Central at 11) features an interview with Sen. Elizabeth Warren (D-Mass.).
Actor David Duchovny and comedian John Oliver are on “The Tonight Show Starring Jimmy Fallon” (NBC at 11:35), with music from Rita Ora.
Ahead of his “Late Show” takeover in 2015, Stephen Colbert comes to the “Late Show With David Letterman” (CBS at 11:35) along with television host Robin Roberts; musical guests are Kelis and Sam Moore.
Comedian Don Rickles and actress Emily Deschanel stop by “Jimmy Kimmel Live” (ABC at 11:35), with musical guest Beck.