Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
rescue [ˈrɛskjuː] n спасе́ние
vt
to rescue (from)спаса́ть (спасти́*perf) (от +gen)
to come to sb's rescue приходи́ть*(прийти́*perf) кому́-н на по́мощь
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.