MovieWeb has four clips from episode #4.15, to air March 12. Clips are also on Eclipse Magazine and AceShowbiz.
BuddyTV has information on episode #4.15, as well on March 19 and March 26 episodes.
Episode #4.15 is dedicated to the director Kim Manners, who passed away on January 25. There will be a photo montage of him compiled in 10 seconds and a brief message (source).