Cast

the policeman's helmet^✦︎ and the Boat Race night policeman

• the Boat Race night policeman wears the policeman's helmet chapter 7

They deal with each other in Carry On, Jeeves 7.

Scenes they share

1. Bertie recalls urging the depressed Sippy to steal a policeman’s helmet.Chapter 7, Piccadilly Circus

Every dealing, in order

• Chapter 7the Boat Race night policeman wears the policeman's helmet (earlier)