To those who belong to the Joss Whedon cult, "Marvel's Agents of S.H.I.E.L.D." is enough to cause some major anxiety right now.
ABC's new comics-inspired spy caper got off to a fine start during premiere week, but on Tuesday night, despite a hinted-at cameo from Samuel L. Jackson, it lost more than a third of its audience of adults ages 18 to 49 compared with the debut, according to Nielsen.
That's enough to make fans wonder if writer-producer Whedon's TV curse will remain intact.
Whedon made his name with "Buffy the Vampire Slayer" and "Angel," shows that established his ability to bend and mix genres in wry, pop-savvy...