TCM has been doing brilliant double features all this month – but today, MGM HD gets in on the act… by showing a double feature of Sidney Poitier films, only a few years apart in time, but miles apart in tone. First, at 10:30 p.m. ET, comes 1963’s Lilies of the Field, in which Poitier plays a temporary handyman carpenter helping out a gaggle of singing nuns. (Well, he gets them to sing, at one point.) Then, at 12:05 a.m. ET, comes 1958’s The Defiant Ones,&