Phase-folded TESS transits of TOI-789 b, c, d, and the candidate .04 (top to bottom), each folded on its best-fit period. Gray points are the unbinned PDCSAP data; colored points are phase-binned for clarity. The red curve is the best-fit joint juliet model (Section 5); the lower strip of each panel shows the residuals, consistent with photometric noise. The shallow depths (∼1 ppt) and the decreasing transit signal-to-noise from b to the candidate .04 are apparent.