On a whim, I decided to watch Day of the Triffids on Tubi TV (it is also on Amazon Prime). I watched parts of it about 17 years ago, so I wanted to see all of it. As I watched, I noticed that film makers must have been inspired by this movie. Specifically, directors of the zombie genre were clearly inspired by this film. Take a look at how Day of the Triffids compares to some zombie movies and a zombie show.
1: When Bill Masen (Howard Keel) wakes up to take the bandages off his eyes (he had eye surgery that kept him from viewing the meteor shower the previous night), he stumbles upon a seemly empty hospital that looks as though it has been turned upside down. This immediately reminded me of 28 Days Later (2002) and The Walking Dead (2010). Jim (Cillian Murphy) and Rick (Andrew Lincoln) both wake up confused in seemingly empty hospitals unaware of the devastation that has occurred, while they were unconscious.
2: After people who viewed the comet go blind, society begins to quickly crumble. This mirrors practically every zombie movie/television show. People have as much to fear from each other as they do from the triffids or zombies. The train station scene where Bill Masen saves the little girl Susan (Janina Faye) from a man after the train crashes illustrates this idea. This is shown again when Bill finds a group of drunken convicts having their way with some blind women. He has to rescue Susan and Miss Durrant (Nicole Maurey) from this disturbing scene. In 28 Days Later (2002), Jim rescues Selena (Naomie Harris) and Hannah (Megan Burns) from the soldiers who lured them to their base under false pretenses. During season 4, episode 16 of The Walking Dead, Rick rips out a dude's (Jeff Kober) throat with his teeth to save Carl (Chandler Riggs), not from zombies, but from a group called the Claimers. One Claimer was about to go all Deliverance (1972) on Carl, so Rick had no choice, but to go rippy rippy with his teethy teethy.
3: Sound attracts triffids the way sound attracts zombies. When Bill discovers the connection between sound and triffids, he uses the music in an ice cream truck to draw the triffids away from his group. Sound has been utilized as a tool for distracting zombies. Dawn of the Dead's (1978) Peter (Ken Foree) and Roger (Scott Reinger) use the department store music to distract zombies, while they explore the Monroeville Mall for supplies. Shaun (Simon Pegg) makes noise and runs from zombies in front of The Winchester to save his friends in Shaun of the Dead (2004). Unfortunately, jukebox music attracts zombies to The Winchester later on in the film.
4: Smart people try to solve the problem. In Day of the Triffids, married biologists Tom (Kieron Moore) and Karen Goodwin (Janette Scott, from the Rocky Horror Picture Show lyrics) spend most of the movie trying to discover how to destroy the triffids. At the end of the movie, they discover that sea water kills them. With this knowledge, the world is saved from those pesky triffids. In Night of the Living Dead (1968), the reporter on TV shares how to destroy the zombies (a blow to the head), so the general public knows how to protect themselves. In Day of the Dead (1985), Dr. Logan (Richard Liberty) attempts to train zombies to be non aggressive by using positive reinforcement. Remember Bub (Sherman Howard)? The company, Zomcon, utilizes domestication collars to turn zombies into house servants in the black comedy Fido (2006).
I rest my case. Day of the Triffids is a zombie movie even though it doesn't have zombies.