Fox is back with a ninth season of the X-Files and will go again with its reality dating TV show Temptation Island.
The bigger changes are at the Viacom-owned UPN network, which was until recently seen as struggling. It has turned things around, capturing hit US TV show Buffy the Vampire Slayer from the WB network. The programme airs on both Sky One and BBC 2 in the UK.
In addition, UPN confirmed it has picked up Roswell, the teen alien drama. Roswell had been with WB but the network decided not to pick up the show for its third season.
UPN hopes that the two shows, which have a strong appeal to women, will help broaden its demographic profile, which is skewed to young men.
"We were actually surprised that WB let Roswell slip away," Tom Nunan, UPN's president of entertainment, said. "It's not unusual for a show to take two to three years to find its creative direction. We're very proud to have this show. We don't want to be just a male network."
The AOL Time Warner-owned WB is responding with its mother-daughter drama Gilmore Girls and a new "Superman -- the early years" show called Smallville. Surprisingly, WB has hung on to Buffy spin-off show Angel.
UPN will also have the next instalment of Star Trek, with a new series called Enterprise. Enterprise, which will not feature the Star Trek name in the title, will succeed Star Trek Voyager, which finishes its seven-year US network TV run next week with a two-hour series finale. To date, all four of the Star Trek television shows have been broadcast on UPN.
Enterprise changes scene a little bit from the last three Star Trek shows from The Next Generation onwards, which have all been set in the same 24th century. The new show is a prequel to the original Sixties show.
On Fox, the X-Files will return for a ninth season, but without David Duchovny, whose character Fox Mulder is likely to remain a permanent alien abductee.
Other bad news for X-Files fans was the cancellation of The Lone Gunmen, the spin-off show that made it to one series. There was good news though for sci-fi fans on Fox, as the network brought back James Cameron's Dark Angel for a second season.
Fox also confirmed that Robert Downey Jr, the troubled guest star of Ally McBeal who is facing drug charges, is to be written out of the programme.
All in, Fox is introducing five new programmes to its schedule, which includes three dramas and two comedies.
Among these will be 24, a whodunit with Kiefer Sutherland, and Undeclared, a comedy set in a college.
Fox will air Temptation Island on Thursday at 9pm directly after Survivor over on CBS. Fox hopes that it will catch the reality TV audience and viewers will switch channels as Survivor ends.
UPN has revealed a new comedy, One on One, a show about a lone-parent sportscaster bringing up his 14-year-old.