Source: Wayne Hall of Syfyportal

Building on the success of “Lost” and other new programs from last season, ABC is adding more sci-fi and related shows to its weekly offerings this fall, according to zap2it.com.

Expected to return in September or October, “Lost” is moving from Wednesdays at 8 p.m. to take that evening’s 9 p.m. timeslot as a lead-in to a new sci-fi drama, “Invasion.”

Here’s the new show’s premise:

“Following a violent tropical storm, a U.S. park ranger’s (Eddie Cibrian) missing ex-wife is found naked and with no memory of how she got that way. Couple that with his young daughter seeing some mysterious floating lights. The ranger starts to investigate and begins to uncover an alien conspiracy that has been spreading across the world for centuries.”

Produced by Warner Bros. Television, the show will star William Fichtner from “Black Hawk Down,” Eddie Cibrian of “Third Watch,” Kari Matchett, Lisa Sheridan, Tyler Labine from “That Was Then,” Alexis Dziena, Evan Peters of “The Days” and Ariel Gade. Shaun Cassidy of “American Gothic” fame and Thomas Schlamme of “Jack & Bobby” are the show’s producers.

Also, in an attempt to challenge the CBS Thursday night ratings juggernaut, ABC is moving “Alias” to 8 p.m. that day to take on the next “Survivor” incarnation.

ABC also hopes that viewers of “Alias” will stick around for a new version of “Night Stalker” at 9 p.m.

The premise for that show is:

“A crime reporter (Stuart Townsend) who also happens to be the FBI’s No. 1 suspect in the bizarre death of his wife prowls the streets of Los Angeles trying to find answers. In addition to trying to connect the dots between murder victims found with a strange red, snake-shaped mark on their hands, he also finds himself delving into a strange supernatural world of crime.”

Producers of the show are “The X-Files” veterans Frank Spotnitz and Daniel Sackhelm. Actors in the show will include Stuart Townsend from “League of Extraordinary Gentlemen,” Gabrielle Union from “Bring It On,” Eric Jungmann of “Not Another Teen Movie” and Cotter Smith from “X2.”