The first season of The Four Seasons on Netflix worked because Tina Fey understood what the Alan Alda source film understood — that a dramedy about middle-aged people in long-term relationships has to actually believe in the relationships to generate any comedy worth having. The show was warmer than expected and funnier than its premise suggested. The second season arrives May 28 with the same structural premise: six friends, four vacations in a single year, and the annual reckoning that time-based stories impose on characters who are trying not to notice how much is changing.