is digging into the past. has been cast in a multi-episode arc in season seven, ET has exclusively learned. Hall, who became an '80s icon with and , will play Donald Ressler's () estranged brother, Robby.When Hall's Donald first re-enters his brother's life, he leads Ressler to the discovery of secrets long thought buried away.
ET exclusively premieres first-look photos of Hall in action on . The 52-year-old actor will be introduced in the season's 16th episode, «Nyle Hatcher,» airing April 24.
He appears throughout the 18th episode, titled «Brothers,» which is slated to air May 1. Also guest starring in the latter episode is alum .At the end of March, Hall teased his guest-starring stint on Instagram with a collage of photos from set,
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