Hello,
There is a missing episode on Museum Secrets on the Roku Channel. The Smithsonian episode in season 3 shows Versailles as the next, but the episode that plays instead is British Maritime Museum, which isn't even listed; everything shows it as Versailles. I don't know where else to report this. Thanks!
Looks like the Roku Channel mislabeled the episodes (missing episode 6 a.k.a episode 21 "Chateau of Versailles") http://www.museumsecrets.tv/sitemap.php
Although it is not listed in Roku Search, Museum Secrets is also on the free Tubi Channel/app. After installing or launching Tubi, use the Search (magnifying glass) on the left side and search for Museum Secrets. Just in case you actually wanted to watch this missing episode. (S3, Episode 6). It is listed and playing correctly on Tubi.
Edited... Roku Search actually is showing Tubi as streaming Museum Secrets but it is further down list and says "Museum Secrets (2001-2001) whereas Museum Secrets for Roku Channel says 2011-2015. Regardless, it is the same show/series. Both Channels streaming 3 seasons.