In the later episode, "Meet the Quagmires", Peter goes back to the time when he was dating Lois, but loses his chance to kiss Lois, prompting Lois to marry Quagmire instead.
Peter goes back to the time when he was dating Lois. This was in the later episode, "Meet the Quagmires". Peter loses his chance to kiss Lois. This is in the later episode, "Meet the Quagmires". Peter is prompting Lois to marry Quagmire instead. This is in the later episode, "Meet the Quagmires".