Although CBSs Ghosts season 4 crossing over with its original British inspiration sounds interesting, the shows creators are wise to avoid this approach. CBSs Ghosts is very similar to its British predecessor of the same name from 2019. Where the British series follows a couple, Alison and Mike, who inherit a mansion from a distant relative, the CBS series sees another couple, Sam and Jay, do the same. The heroines of both shows, Alison and Sam, gain the ability to communicate with ghosts after a near-death experience. However, the two popular sitcoms share a handful of important differences, too.

https://screenrant.com/ghosts-season-4-us-uk-show-crossover-avoid-good/