ɪnðɪ ˈɜːli nˈaɪntiːnhˈʌndɹɪd fˈoːɹɾi z, lˈuːsi ænd ɹˈɪki mˈuːvd ˌɪntʊ ðə bɹˈaʊnstoʊn, ænd fɹˈɛd, ˈɛθəl, lˈuːsi, ænd ɹˈɪki kwˈɪkli dɪvˈɛləp ðɛɹ fɹˈɛndʃɪp ðə dˈeɪt ʌvðə ɹɪkˈɑːɹdoʊz tˈɛnənsi tʃˈeɪndʒd dˈʊɹɹɪŋ ðə dʊɹɹˈeɪʃən ʌvðə sˈɪɹiz, wɪð fɹˈɛd ænd ɹˈɪki ɹɪkˈɑːɹdoʊ bᵻkˈʌmɪŋ bˈɛst fɹˈɛndz, ænd lˈuːsi ænd ˈɛθəl dˌuːɪŋ ðə sˈeɪm.
In the early 1940s, Lucy and Ricky moved into the brownstone, and Fred, Ethel, Lucy, and Ricky quickly develop their friendship (the date of the Ricardos' tenancy changed during the duration of the series), with Fred and Ricky Ricardo becoming best friends, and Lucy and Ethel doing the same.