UNFORGOTTEN'S writer has confirmed there are a string of hidden clues in the ITV drama's theme song. The long-awaited series four of the ITV drama has had viewers gripped since it debuted last month.

But the cold theme runs deeper than beef. It’s the blueprint for his next chapter—ICEMAN. What started as cryptic posts on his finsta (a Kimi Raikkonen photo here and a Top Gun reference there ...