Mago Martindale has joined not one, but two new pilots. And does that mean "A Gifted Man
" is facing cancellation?Martindale, an Emmy winner for her work on "Justified
," will guest star in Showtime's "Masters of Sex" pilot
. Martindale will play the Miss Horchow, the "very by the book secretary" of William Masters (Michael Sheen). Beau Bridges has also joined the cast as University Chancellor Barton Scully, Masters' boss. "Party Down" star ...