Spoiler alert for those who have yet to see Part Four of Torchwood: Children of Earth.
In an answer to Michael Ausiello question about the risk in killing off a popular character, Torchwood creator Russell T. Davies replied: "Absolutely. There’s a risk that some people won’t come back to watch now that Ianto’s gone. I thank them for watching the show and I recommend they go watch Supernatural, because those boys are beautiful. And don’t tell me they’re brothers. [Laughs] Not in my mind."
Source: EW.com.