Once the industry's second chance — for failed shows' slots, for breakout hits, for viewers tired of fall's leftovers — the midseason replacement is disappearing with the calendar that created it.
The phrase survives in trades headlines and writers' contracts, but the twenty-two-episode season it describes has become an endangered industrial species.
Born as a budget trick to bank money for later episodes, the bottle episode now gets advertised on posters — a complete inversion of what it was invented to hide.