ONCE UPON A TIME … IN HOLLYWOOD (2019) 8 p.m. on Starz. “Leo, I’ll ride on your coattails any day, man,” Brad Pitt said when accepting the Oscar for best supporting actor for his performance in this most recent feature from Quentin Tarantino. The ride here is a wild one: Set in 1969, “Once Upon a Time … in Hollywood” casts Leonardo DiCaprio and Pitt as an over-the-hill Hollywood actor and his stunt double, with a plot that involves career problems, L.S.D. and Charles Manson. It’s a passionate look back at a particular time in Hollywood. It’s also a story of friendship between the two men — a relationship that, A.O. Scott wrote in his review for The Times, serves as “an organizing principle and a source of meaning, and a major reason that ‘Once Upon a Time’ is more than a baby-boomer edition of Trivial Pursuit brought to life.”

STEVEN UNIVERSE FUTURE 7 p.m. on Cartoon Network. Rebecca Sugar’s hit animated show “Steven Universe” ended last year, but it has already had a pair of postscripts: “Steven Universe: The Movie” and “Steven Universe Future,” an epilogue show that has explored Steven’s life after the end of the human-alien conflict covered by the original series. “Future” ends Friday night with a set of four short episodes.