If nothing else, you have to applaud NBC for courageously ignoring demographic pressures and committing to "Twenty Good Years," a comedy that is about aging baby boomers on the cusp of retirement. No series with veteran comedic actors John Lithgow and Jeffrey Tambor can be dismissed out of hand. [...] if "Twenty" proves anything, it's that even gifted performers can't conceal the flaws of a truly uninspired script, though they can distract from them here and there.

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