The R. Tam sessions are a series of five short videos released by Joss Whedon over the internet, which were set within his fictional Firefly universe. They chronicled several of the early in-universe interviews with the emotionally troubled Firefly character River Tam.

Although released unofficially, the videos were meant as a form of viral marketing for the 2005 film Serenity. The sessions were released on the internet between August 16 and September 5 of 2005. They are included in the Collector's Edition of "Serenity"