Viper was a new show by NBC in 1994. The show was pulled off the air for a year for re-tooling/re-casting. The only original cast member to remain in all four seasons of the show was Joe Nipote as Frankie "X" Waters.
The First Season included James McCaffrey, Dorian Harewood and Joe Nipote. When the series returned in 1996, Joe Nipote was the only original cast member remaining.