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The pair, who played Martha Kent and Lionel Luthor, respectively, on the long-running Superman TV series, join a cast which also includes Clark Freeman, Laura Heisler and Giovanna Zacarias.
The report says that Freeman plays a man who offers $30,000 to anyone who can prove the afterlife exists, while O’Toole appears as his protective mother and Glover plays a “believer” who joins the quest.