"When The Boat Comes In" (or "Dance Ti Thy Daddy") is a traditional English language folk song, listed as 2439 in the Roud Folk Song Index. The popular version originates in North East England. An early source for the lyrics, Joseph Robson's "Songs of the bards of the Tyne", published 1849, can be found on the FARNE archive. In FARNE's notes to the song, it is stated that the lyrics were written by William Watson in about 1826. It was popularised as the theme tune of the 1970s BBC drama serial When The Boat Comes In, in an arrangement by the composer David Fanshawe.