Is It Safe? is the second album from Ph.D., released in 1983. It was their last album until their 2009 comeback Three. Is It Safe? was reissued by Voiceprint Records in 2010. Drummer Simon Philips had quit the band, which now consisted solely of Jim Diamond and Tony Hymas. The album's opening track, "I Didn't Know", failed to chart in Britain but was a hit across Europe. Certain later pressings of the album feature the band's signature song, "I Won't Let You Down", at the end of side 1, which was originally released on their eponymous debut album Ph.D.. "Fifth of May" was re-recorded for Three.