Also,
come in out of the cold. Return to shelter and safety, be welcomed into a group. For example,
Bill was fed up with traveling on his own for the company and hoped they'd let him come in from the cold , or
After years of not being invited to join, Steve was finally asked to come in out of the cold . This phrase, generally used figuratively, gained currency in the 1960s with John LeCarré's best-selling spy novel,
The Spy Who Came in from the Cold, about a long-time British spy in the cold war who longed to abandon the dirty tricks of his profession. Also see
come in out of the rain.