Night After Night is an album recorded live by the British band UK.
Recorded in late May and early June 1979 at Nakano Sun Plaza and Seiken Kan, Tokyo, Japan, it is UK's third album and their first live album, released in September 1979 in support of the band's US tour supporting Jethro Tull (which Eddie Jobson joined after UK's split), and later headlining European tour.
The album was remastered in 2016 and included as part of the box-set "Ultimate Collector's Edition", along with an extended version containing songs not included in the original album. 
According to Eddie Jobson, the album was recorded at the request of Polydor in Tokyo, originally intended for a Japan-only release, but Polydor in the US were also interested in releasing it.
The title track and "As Long As You Want Me Here" do not appear on any studio release by the band. The title track was released also as a single (in an edited version), with a non-LP studio track as a B-side titled "When Will You Realize" that didn't appear on any CD until the 2016 Ultimate Collector's Edition boxset (although it was re-recorded with different lyrics on John Wetton's solo album Caught in the Crossfire in 1980). This track is said to be the one that split up UK.