Wiktionary
double back
vb. (context idiomatic English) To retrace one's steps; to go back where one has already gone.
WordNet
Usage examples of "double back".
It'd be just like that wily fox, Diamond Jack, to split off from what was left of his gang and double back into the Breckenridge breaks.
And then I could at last shut, with a clear conscience, the door of my stateroom and get my double back into the recessed part.