In Through the Out Door is the eighth studio album by the English rock band Led Zeppelin. It was recorded in three weeks in November and December 1978 at ABBA's Polar Studios in Stockholm, Sweden, and released by Led Zeppelin's label Swan Song Records on 22 August 1979 in the US and 24 August 1979 in the UK. No. 1 on the Billboard 200 for 7 weeks, from the issue of September 15, 1979. Wiki link