The initial Sam and Diane relationship was a 'love story' that felt alive and crackling, but the introduction of Kirstie Alley as Carla provided a different, equally compelling dynamic. The writers smartly recognized they couldn't repeat the Sam and Diane formula, instead creating a triangle where Carla chased someone else, ensuring fresh conflict.
Impact: High. This reveals the strategic evolution of character relationships in long-running shows to maintain audience engagement.
In the source video, this keypoint occurs from 00:56:14 to 00:57:57.
Sources in support: Adam Scott (Actor)

