NEW YORK, March 12 (UPI) -- Alan Cumming, Tahmoh Penikett and Laura Vandervoort have signed on to star in the four-hour U.S. television movie "Riverworld," Syfy said Friday.
The program is to air April 18 from 7-11 p.m. ET.
Syfy said "Riverworld" is "an epic adventure featuring familiar characters in an unfamiliar world and is based on the popular award-winning series of novels by Philip Jose Farmer."
It is produced by Reunion Pictures and will be distributed internationally by RHI Entertainment.