* In the Series 13 episode "TV Documentary", there's a repeated message for Leading Seaman Riddle to report to the Bridge. The messenger begs and pleads for him to get to the Bridge but he never turns up. During the climax when another British ship is shooting at Troutbridge [[spoiler:the messenger reveals that that Riddle has been there the entire time. He's Leading Seaman Riddle]].
* Any scene with "Burbly Burwasher".