 Ianto and Jack's relationship is referred to by Owen in "Captain Jack Harkness" when he calls Ianto Jack's 'part-time shag'.Their relationship is displayed for the first time in "End of Days" in which Ianto and Jack kiss after finding Jack is alive.Also during this episode, Ianto is clearly distraught when finding out Jack is dead, and smells his coat, reminiscent of gay cowboy film, "Brokeback Mountain".