With his role as President Jed Bartlet on NBC's "The West Wing" winding down, the elder Sheen will have time to appear on his son's series, Zap2it.com reported.
Martin Sheen made a guest appearance while Charlie was on "Spin City" and the father-son duo cut a couple of movies, including "Wall Street" and "Cadence."
Lorre did not reveal, however, whether the Sheen patriarch would share a smooch with Taylor's character Evelyn Harper.
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