The episode title is Spanish for "Of the Innocents."
On the flight home at the end of the episode, Clara comments that Jack has a worse poker face than her late husband did. Conversely, in the CSI: NY (2004) episode "Bad Beat (2005)", Detective Flack comments about Mac Taylor, played by Gary Sinise, "There's a man with a poker face".
The Agatha Christie novel And Then There Were None is about a group of people invited to an island by an unknown host. Each person is killed in line with the verses of a nursery rhyme where little boys leave the group in variously violent or unlikely ways, for example, one boy just oversleeps, while one is hugged to death by a bear.
The original theme (title, rhyme, island name) was considered offensive by Americans despite not being a slur in the time or country it was written and so was changed to "Indian boys", which was equally offensive but to a different group of people.
The original theme (title, rhyme, island name) was considered offensive by Americans despite not being a slur in the time or country it was written and so was changed to "Indian boys", which was equally offensive but to a different group of people.