These documentaries, directed by Gabriel Soria, were produced for the Sólo Tango TV station (now TangoCity) and released between 2000 and 2005. Approximately 55 episodes were made. The list below is very incomplete; I welcome any comments and corrections. I provide links to the episodes available online.
Between 1995 and 1998, the Argentine TV channel Volver screened a series of tango documentaries. The series was directed by Eduardo Berti, and includes valuable testimonies from many great musicians and vocalists, as well as commentary from journalists and collectors. As is often the case with things tango-related, there is very little information available about them. The list that follows was reconstructed from references found in magazines, newspapers, and other reliable sources. I managed to obtain copies of most episodes, which I have since uploaded to my YouTube channel and which you can watch by clicking on the corresponding links below.