What to Watch Tonight: All the New Movies and Shows Added on Sunday, Sept. 20

Tom’s Guide has also published a detailed “Sunday night lineup” guide for September 20, mapping out everything that dropped that day across Netflix, Paramount+, Max (formerly HBO Max) and other major platforms. The piece groups titles by service and format—movies, scripted series, reality shows and live specials—so readers can quickly see what’s brand‑new versus what’s simply getting a fresh episode. Particular attention is paid to streaming debuts of recent theatrical films and first‑episode premieres of original series that are expected to drive social buzz that night. The guide effectively doubles as a catch‑up tool: if you’re already following an ongoing show, you can confirm whether a new installment is available before you sit down to watch. Release dates and catalogs differ internationally, but for Japanese viewers the article functions as an easy way to gauge what’s lighting up prime‑time conversations in the U.S. and which titles might soon climb global trending or Top 10 charts once local rights windows allow.