Mad; Bad; and Dangerous to Know was the second album released by The Cross, appearing in 1990. Unlike the previous album, which contained some dance influences, this one is a straight rock album. This was the first album to which each member of the band contributed, though Roger Taylor's contribution was considerably smaller because he was busy promoting The Miracle. Unusually Clayton Moss sang lead vocals on one track, instead of Taylor.
Like Shove it, the album sold poorly and EMI Records decided to drop them so they had no label anymore in the UK.
In Germany, a limited box set (only 50 were made) was released which contained a CD single, video, stickers and press information.