How Did They Build That? “Summit & Submerge” S4E7 September 14 2025 on Smithsonian

On Sunday September 14 2025, Smithsonian broadcasts How Did They Build That?!

Summit & Submerge Season 4 Episode 7 Episode Summary

In the upcoming episode titled “Summit & Submerge” of “How Did They Build That?”, viewers will see the challenges faced by a dedicated team as they take on two unique construction projects. The episode promises to showcase the innovative solutions and teamwork required to build structures in demanding environments.

The first project takes place on the icy heights of Colorado’s Pikes Peak. Here, the team is tasked with building an eco-friendly visitor center in the permafrost. This setting presents a variety of challenges, from the extreme weather conditions to ensuring that the construction methods are sustainable. The team must find ways to work with the natural environment while creating a welcoming space for future visitors.

The second part of the episode shifts focus to a different kind of challenge. A museum is set to be constructed in a disused dry dock that is at risk of collapsing. The team will need to navigate the complexities of working with an unstable structure while also preserving its historical significance. This project highlights the importance of creativity and engineering skills in transforming old spaces into new venues for learning and exploration.

“Summit & Submerge” promises to be an exciting episode that illustrates the dedication and ingenuity of the construction team. Viewers can look forward to seeing how they tackle the obstacles of building in extreme conditions and restoring a piece of history. This episode will air on Smithsonian, bringing fascinating insights into the world of construction and design.

What Time is the “Summit & Submerge” Episode On?

The Summit & Submerge episode of How Did They Build That? will be broadcast on September 14 2025 on Smithsonian at 9:00 PM at ET/PT.

Is the “Summit & Submerge” Episode New?

The Summit & Submerge episode of How Did They Build That? is all new!

How Did They Build That? Summit & Submerge Cast & Stars

Main Cast

Summit & Submerge Episode Videos & Previews

Watch How Did They Build That? Summit & Submerge Online

Watch the show online

How Did They Build That? Series Information

An exploration into impressive man-made structures, investigating how new materials and cutting-edge technology allows engineers, builders and architects work to the limits of what is possible.