After 13 years, there are still millions of people who think the truth is still out there. When "The X-Files" TV series returned to Fox Sunday night after a 13-year absence, over 13.5 million people tuned in to the first episode of the six-part miniseries to see what's next for Fox Mulder (David Duchovny) and Dana Scully (Gillian Anderson). With ratings so high right away, could there be news of additional new episodes in the future?

According to TVLine, the 13.5 million viewers for the miniseries premiere tops the 2002 series finale of the sci-fi show, which saw 13.3 million viewers. When the show originally debuted in 1993, it drew 12 million viewers. "The X-Files" also had a 5.1 rating in the demo Sunday night. The viewership for Sunday night may actually be even higher than 13.5 as more-complete ratings are expected to be released later Monday afternoon. "The X-Files" ran for nine seasons from 1993-2002 and it had a cult following throughout it's years on TV.

The X-Files Return Ratings Millions of people tuned in Sunday night to see the return of Dana Scully (Gillian Anderson) and Fox Mulder (David Duchovny) on Fox's "The X-Files." Photo: Fox

High ratings for "The X-Files" is good news for Fox as well as fans. At the 2016 TCA Winter Press Tour on Jan. 15, show creator Chris Carter revealed to E! Online that if the show does well and the network wants more episodes, there could be more "X-Files" in the future. At this time, there are no plans for a spinoff, but that could change. Fox co-president Gary Newman also said he'd be interested in having more stories of "The X-Files" but that it would depend on availability.

"I'm waiting for Fox to come back and say, ‘We want more of these,'" Carter said.

Carter told The Hollywood Reporter he was hoping the show would get high ratings and that everyone involved with the show would "consider all options." For now, he's just hoping to successfully present the series in modern times.

"No one has ever done this on television. I just wanted to bring the show into what I would call a brave new world. I would call that our mission statement, but our mission statement is always, 'It's only as scary as it is believable.' It has to take place within the realm of extreme possibility," Carter dished.

"The X-Files" miniseries continues Monday, Jan. 25, on Fox at 8 p.m. EST. Watch a promo video for the series below: