Mudos testigos is a cinematographic collage made from all the surviving material of Colombian silent films, re-editing the images in such a way as to create a single imaginary film: the impossible love story of Efraín and Alicia that traces the convulsive first half of the twentieth century in Colombia. Compiled by the late Luis Ospina and finished posthumously by Jeronimo Atehortúa.
Unfortunately the movie Silent Witnesses is not yet available on HBO Max.
| Directing | Luis Ospina | Director |
| Directing | Jerónimo Atehortúa Arteaga | Director |
| Production | Lina González | Associate Producer |
| Sound | Jose Delgadillo | Sound |
| Sound | Mercedes Gaviria | Sound |
| Sound | Diana Martínez | Sound |
| Sound | Carlos Quebrada | Music |
| Writing | Luis Ospina | Writer |
| Writing | Jerónimo Atehortúa Arteaga | Writer |
| Production | Jerónimo Atehortúa Arteaga | Producer |
| Production | Eva Chillón | Producer |
| Production | Juan Sebastián Mora Baquero | Executive Producer |
| Writing | Juan Sebastián Mora Baquero | Writer |
