The special (documentary) episode will be shown here in the US near the end of April.  Probably after the series episodes are done.

I just checked.  It is already up on PBS.ORG.  If you are a Passport member, you can watch it now.

This series definitely needs to be renewed.  It is such a fun show to watch.

@springfield45 wrote:
Hello,  January 7, 2024

I don't know if a Season 5 has been approved yet but if it follows true to form,  It will be late in 2024 ending with a Christmas special.

Red Letters = SECONDMENT (a temporary assignment of a member of one organization to another organization)