While returning to the Enterprise in a shuttle, Picard, Data, La Forge and Troi take turns being momentarily frozen in time. They are in an area of space pocketed with temporal distortions. When they get to the Enterprise there is a warp core breach in progress, which has something to do with a nearby Romulan warbird and, in turns out, aliens from another continuum. Picard and his cohorts have to figure out the mystery before every goes "ka-boom." "Timescape" is an average STNG episode, with some interesting variations on temporal distortions, but the series has done much better (e.g., "Cause and Effect," the classic Episode 119).