Which episode immediately precedes The Big Bang Theory finale?

The Change Constant is the episode immediately before The Big Bang Theory finale.

It is the 23rd episode of season 12, while “The Stockholm Syndrome” is the 24th and final episode. The Change Constant therefore occupies the penultimate position in the series’ 279-episode run and was broadcast one week before the finale in May 2019.

The episode’s title reflects the characters confronting major changes as the series approaches its conclusion. Sheldon and Amy’s Nobel Prize ambitions become increasingly important, and the group begins moving toward the life transitions resolved in the finale.

Several answer choices can seem plausible because they are also late season-12 titles. “The Maternal Conclusion” is the preceding episode to The Change Constant, while “The D&D Vortex” appears earlier in the season. “The Conjugal Configuration” is the season premiere, not the episode before the finale.