When Valentine's Day comes around, all of the Peanuts characters try to seek love. The special begins with Charlie Brown sitting under the mailbox. Lucy asks what he is doing, and he tells her he is waiting for a valentine. She wishes him good luck, and he thanks her. But true to normal, as she walks away, she adds, "You're gonna need it!". Lucy tries to get Schroeder to like her. Sally, thinking that Linus gave her a gift, tries to get him something great so that he will love her, Linus tries to tell his teacher, Miss Othmar, that he loves her, and Charlie Brown desperately wants to get a valentine. In the end, everybody is disappointed, only Charlie Brown is cheered up when he gets a used valentine from Violet the next day, despite Schroeder's reprimanding.
Other components include a Valentine's fair, a puppet show from Snoopy (with effects) and the joys and tribulations of homemade valentines. There are also references to romantic literature, infrustration, Linus throws chocolates off a bridge saying, "Elizabeth Barrett Browning" and "How Do I Love Thee?", as he does so. Unbeknownst to Linus, Snoopy and Woodstock are down below, so the chocolates do not go to waste.
- Duncan Watson – Charlie Brown
- Melanie Kohn – Lucy van Pelt
- Lynn Mortensen – Sally Brown
- Stephen Shea – Linus van Pelt
- Linda Ercoli – Violet/Frieda
- Greg Felton – Schroeder
- Bill Melendez – Snoopy/Woodstock
- Schroeder calls for Joanne Lansing while passing out valentines. Joanne Lansing is an ink and paint artist who worked on many Peanuts specials from 1972 to 1991.
- After the special first aired, many children sent Charlie Brown valentines out of sympathy, just as they had sent him sweets after It's the Great Pumpkin, Charlie Brown was first broadcast.
- This special was nominated for the Emmy Award for Outstanding Children's Special (as was It's the Easter Beagle, Charlie Brown). The award went to Yes, Virginia, There Is a Santa Claus, which was directed by Bill Melendez.
- At the end credits, puppet caricatures of everyone who worked on the show, including Charles Schulz, Lee Mendelson, Bill Melendez, and the Peanuts kids were shown.
- The scene where kids leave to celebrate Valentine's Day appears to be borrowed from another Peanuts special, You're Not Elected, Charlie Brown.
- It was the last special for Stephen Shea as Linus and Lynn Mortensen as Sally. They would be replaced by Liam Martin and Gail M. Davis, respectively.
- Sally Brown's candy heart is apparently inscribed with Elizabeth Barrett Browning's Sonnet Sonnet Number 43 from the Portuguese.
- The abridged and high pitched version of music box dance music is reused from It's the Easter Beagle, Charlie Brown when Snoopy presses the music box.
- This is the first time Linus van Pelt says to Charlie Brown, "Happy Valentine's Day, Charlie Brown" at the end of a TV special. Linus says the same thing to his friend at the end of the 2002 TV special A Charlie Brown Valentine.
- Be My Valentine, Charlie Brown on the Internet Movie Database.
- Be My valentine, Charlie Brown on the Big Cartoon Database.
- Be My Valentine, Charlie Brown on AllMovie.
- Quotations from Be My Valentine, Charlie Brown on Wikiquote.