Dead Letter
- Episode aired Mar 19, 1979
![Danger UXB (1979)](https://m.media-amazon.com/images/M/MV5BZjQzZDRhMGQtZjEyYi00MmM5LWJkZGYtZDY1OTk0OWJkNzBhXkEyXkFqcGc@._V1_QL75_UY281_CR5,0,190,281_.jpg)
A large UXB in the London Underground brings Ash face-to-face with a new type of fuse. Meanwhile, Susan may not be forever lost.A large UXB in the London Underground brings Ash face-to-face with a new type of fuse. Meanwhile, Susan may not be forever lost.A large UXB in the London Underground brings Ash face-to-face with a new type of fuse. Meanwhile, Susan may not be forever lost.