"I wish I was in Carrickfergus" is the title of a traditional Irish ballad sung by Grace Burgess in Episode 1.1. She sang this song to Harry Fenton in order to convince him that she was a worthy candidate of the job of a barmaid at The Garrison Pub. The lyrics are as follows:

“…I wish I was in Carrickfergus
Only for nights in Ballygrant
I would swim over the deepest ocean
The deepest ocean, my love to find
My boyhood friends and my own relations
Have all passed on now like the melting snow…”