The on-set tension between The X-Files stars David Duchovny and Gillian Anderson has been well documented, and was very different from the tension between their FBI agent characters in the sci-fi series. In a new episode of Duchovnys Fail Better podcast, the actor sat down for an in-depth chat with his former co-star, and now friend, Anderson, and, of course, the subject of their relationship ups and downs was discussed.