Slow-starting but eventually intense two-hander (including an ageing Elizabeth Sellars) about a country-house being infested by a multitude of rats (which are never actually seen kudos, then, to the realistic and genuinely scary sound effects, lending the whole an appropriate apocalyptic feel).
The title refers to a goofy radio program which first alerts citizens to the 'plague'; at first, only one or two rats are heard scratching at the floor-boards (they're trying to get in to shelter from the cold) so that Sellars' husband ignores her appeals of the impending danger (already evident from the mysterious presence of an abandoned car outside the couple's home, which is actually the very opening shot of the episode!) and attempts to chase them away by merely stamping his foot, or beating a club, on the ground!!
However, the situation soon deteriorates especially since it's apparent that the rodents are impervious to all forms of poison: they have somehow evolved and, in fact, the radio presenter starts referring to them as "super-rats"! In desperation, Sellars contacts Barty to ask for help
but he's not familiar with the area in which the house is situated and, furthermore, gets the surname wrong! All of a sudden, though, the relentless (and deafening) scratching and screeching stops the distraught couple open a window in relief, only to 'see' an arriving partying neighbor and his guests fall foul of the deadly mass of rats