Also New To Blu-ray: Given its status as the third largest city in Pennsylvania, you’d think that Allentown would merit more mentions in classics movies. But “42nd Street” aside, the shout-outs are few and far between. But the Queen City gets name-checked prominently in “The Thin Man” (1934, Warner Archive, unrated, $20), the initial entry in the beloved series about everyone’s favorite crime-solving couple (William Powell, Myrna Loy). While Allentown is mentioned as a possible location for the chief suspect in the sleuths’ latest case, they never make the trip to the Lehigh Valley, preferring to walk their beloved pooch Asta instead.