Season four of the series was an up and down experience for numerous reasons. When it first aired on the SciFi Network (now Syfy), the 20 episodes were spread over 12 months, with a seven month hiatus between the first eleven and last nine, frustrating the audience. Furthermore, the scripts had a "been there, done that" aspect and I think the writers were filling time in order to get to the tidy conclusion.
Season four does have some great episodes that include "Guess What's Coming to Dinner," "Revelations," "Sometimes a Great Notion," and "No Exit." One of my favorite scenes in the entire series is in "Revelations" where Tigh (Michael Hogan) reveals his secret to Adama (Edward James Olmos). This emotional scene captures the essence of the series of being a story about people and relationships and not about technology.