WHAT? DOOR!

Where to Watch WHAT? DOOR! Season 1 Episode 40 Online Free - WHAT? DOOR! EP.40 | My Name is Boy Next Door, I'm a Detective: Great Detective Next Door

Looking for where to watch WHAT? DOOR! Season 1 Episode 40 ("WHAT? DOOR! EP.40 | My Name is Boy Next Door, I'm a Detective: Great Detective Next Door") online? MyFlixer streams it free in HD. Press play above; if the first server is slow, switch to another one with a single click and the episode continues without a page reload.

WHAT? DOOR! is a reality series that first aired on December 19, 2023 on YouTube. The series stars Myung Jae-hyun, Park Sung-ho, Riwoo and Taesan. So far it spans 6 seasons and 99 episodes and its current status is "Returning Series". Season 1 has 55 episodes, and episode 40 originally aired on July 15, 2025 with a runtime of about 26m. The show holds a 10.0/10 rating on TMDB.

About the series: Knock, knock! Who's there? BOYNEXTDOOR! This variety show focuses on k-pop boygroup BOYNEXTDOOR and shows off the group's fun times off stage.

All episodes of WHAT? DOOR! are organised by season on MyFlixer, so you can binge from the pilot to the latest episode in HD. Scroll down for the full Season 1 list and for similar shows such as Run BTS!, BTS In the SOOP and Top of the Pops.

WHAT? DOOR! Season 1 FAQ

Is WHAT? DOOR! Season 1 Episode 40 free to watch on MyFlixer?

Yes. Every episode of WHAT? DOOR!, including Season 1 Episode 40, streams free in HD on MyFlixer (MyFlixerz) with no registration.

How many episodes are in Season 1 of WHAT? DOOR!?

Season 1 of WHAT? DOOR! has 55 episodes, and all of them are listed on this page with direct watch links.

When did WHAT? DOOR! Season 1 Episode 40 air?

Episode 40 of Season 1 ("WHAT? DOOR! EP.40 | My Name is Boy Next Door, I'm a Detective: Great Detective Next Door") first aired on July 15, 2025.

Can I watch WHAT? DOOR! on my phone or TV?

Yes. The MyFlixer player works in any modern browser on Android, iPhone, iPad, laptops, desktops and smart TVs, with no app to install.