Trivia / Star Trek: The Next Generation S2E2 "Where Silence Has Lease"

• Blooper: Ensign Haskell, the unlucky redshirt, can clearly be seen hyperventilating through his nose long after he's supposed to be dead. The obviousness of his breathing and the weirdness of his pose (in a fetal position with his clasped hands shoved into his mouth) suggest the actor thought he was supposed to be catatonic rather than dead.
• Recycled Set: The appearance of the Yamato, another Galaxy-class starship, means they can just reuse the Enterprise sets. They do, however, do some modification to make it look like there are two bridges side by side.
• What Could Have Been: The role of Nagilum was planned for Richard Mulligan, but his commitment to Empty Nest prevented him from taking the role. The name "Nagilum" is "Mulligan" backwards, minus one L.