At 14:53 - as the group goes up the stairs - twin girls can be seen in the background which look like the Grady twins in The Shining.
First teaser for the final season was announced on Dark's Instagram page with an "Infinity" symbol on 23 May 2020.
Shooting wrapped December 15, 2019.
The release date for the final season was officially announced on 26 May 2020 that it would be released on 27 June 2020.
In the final montage the song "Bad Kingdom" by May and Robert Koch is added at min 49:00. This is a cover version; the original version is from German electronic music group "Moderat." One of the members of Moderat, Sascha Ring (aka "Apparat"), is who composed the haunting main title theme, "Goodbye," for the DARK series.