Rex Features
The pair join Joseph Fiennes and John Cho, who were signed up to the project last week.
Flash Forward follows the events that take place after the entire world falls unconscious for 2 minutes and 17 seconds and witness visions of the future.
Walger will play Olivia, the wife of Fiennes's FBI agent whose vision involves her falling in love with another man. Woods has been cast as an FBI tech wizard who uncovers a clue to unraveling the mystery of the blackout.
