 In Seven s assessment of ship-wide efficiency, she brings to the Captain s attention three  black sheep  crewmen who have slipped through the cracks. Mortimer Harren (Jay Underwood) the overly-qualified underly-enthused engineer, Tal Celes has no confidence in herself and doesn t inspire it in others, and William Telfer the resident hypochondriac. Seeking to guide her strays back to the flock, Janeway orders them all to join her on an away mission to a class  T  nebula in the Delta Flyer. Anxiety strikes when the know-it-all Harren gets sensor data very wrong, Tal is so worried about being wrong she can t get anything right, and an intrusive alien gives Telfer his first real medical emergency.