Under Lock and Key is the third studio album by American heavy metal band Dokken, released on November 22, 1985, through Elektra Records.

Eduardo Rivadavia in his review for AllMusic calls Under Lock and Key "quite possibly Dokken's most 'complete' album, with a little something for every type of fan", like "fist-pumping headbangers", extraordinary "bittersweet mid-paced rockers" ("Unchain the Night" and "The Hunter") and "saccharine ballads".

[8] Canadian journalist Martin Popoff considers the album "too weighted towards Def Leppard's fat-and-open formula rock", resulting "a bit subdued and predictable" in comparison with its predecessor.

The band's glamorous look, the media exposure and George Lynch's "attempt to define the L.A. sound in his own image" do not save Under Lock and Key from sounding "like the work of a band just fed".

The music videos produced for the singles from the three Dokken albums were featured on a longform videocassette release, Unchain the Night, by Elektra/Asylum Records through Elektra Entertainment.