Editing Johnny and the Bomb (section)

===Differences between book and TV series===
In the book, Johnny changes history so that no-one dies in the Paradise Street bombing. However, the TV series has this as the original history, which the gang inadvertently changes on their first visit to the past. In the history thus created, Simon was jailed in the Tower of London for being a Nazi spy though he is later released; Johnny's grandmother was killed, meaning he no longer exists. When Johnny faces his own grandfather, he mistakes him for an intruder. She is then saved due to the alarm going off and Johnny exists again.

A smaller change is that in the series, Stephen (Wobbler) is renamed Walter, later Sir Walter.