come to rescue
come to (someone's) rescue
To help someone in trouble. The phrase can be used for both serious and trivial situations. Thank goodness the lifeguard came to my rescue; otherwise, I might have drowned! Thanks for the notes! You totally came to my rescue after I missed so many classes.
come to (someone's or something's) rescue
to rescue or save someone or something. The paramedics came to our rescue at once. A big donor came to the college's rescue.