'BLACK BOX': After undergoing treatment in rehab, Catherine (center) returns to face the fallout at home and at the Cube. (Giovanni Rufino/ABC)

Broadcast live from the Ed Sullivan Theater, “CBS News: 50 Years Later, Civil Rights” (Smithsonian at 8 p.m.) brings together actress Rosie Perez, Rep. John Lewis (D-Ga.) and entertainer/civil rights activist Harry Belafonte, among others, to discuss how the civil rights movement of the 1960s has had a personal impact on their lives. “Face the Nation” host Bob Schieffer moderates the discussion.

FINALE WATCH: The final two chefs prepare five signature dishes to be judged by renowned Los Angeles chefs and their former competitors before the winner is crowned on the “Hell’s Kitchen” (Fox at 8) Season 12 finale.

Seth Green, Monica Potter, Jenna Elfman, Dave Foley, Michael Ealy and Katy Mixon are celebrity players on tonight’s “Hollywood Game Night” (NBC at 8).

FINALE WATCH: “Black Box’s” (ABC at 8) first season (and very likely its last) wraps up with Catherine refusing hospital time, and the arrival of Esme’s biological father.

Gloria Steinem, Robert Kennedy Jr., Cecile Richards and more take part in a conversation about how social change movements like feminism, civil rights and environmentalism helped shape the decade on “The Sixties” (CNN at 9).

Ryan proves his loyalty to the GTF and Daniel decides to embrace his true identity on “Gang Related” (Fox at 9).

After moving into their Stockholm apartment, Bruce tries to introduce himself to the neighbors on “Welcome to Sweden” (NBC at 9).

RETURNING SHOW: “Project Runway” (Lifetime at 9) returns for Season 13 and with one contestant hailing from a past season; all the designers face an elimination challenge before they can be granted a spot in the competition.

TCM presents “Kirk Douglas: Before I Forget” (10), the now-97-year-old acting legend’s one-man show from 2009 that allowed Douglas to reflect on his journey to becoming a better actor, father and human being.

While being mentored by Jeff Ross, the remaining comedians participate in a roast of Gilbert Gottfried on “Last Comic Standing” (NBC at 10).

Actor Morgan Freeman is on “The Tonight Show Starring Jimmy Fallon” (NBC at 11:35), as are musical artists Kesha and Tweedy.

Medal of Honor recipient Ryan Pitts stops by the “Late Show With David Letterman” (CBS at 11:35), with Sharon Van Etten playing musical guest.

Actors Justin Theroux and Angie Harmon come to “Jimmy Kimmel Live” (ABC at 11:35), with music from boy band newcomers 5 Seconds of Summer.

Rachel Lubitz