Though Gillian Anderson's contract extends through season eight, it's doubtful that the show could go on minus the finely-tuned rapport of Mulder and Scully. People love it. They understand it. Therefore, even if I was indispensable at one point, I'm no longer indispensable.
Nobody is indispensable.
It's a brand name. It's something like that. Duchovny isn't as sure as to how he'd feel if the show did in fact go on without him. I feel really proprietary about the character. There would be part of me that would be sitting at home wishing thoroughly that it would fail.