Watford have appointed former boss Quique Sanchez Flores following the sacking of head coach Javi Gracia just five matches into the season.
The 54-year-old Spaniard returns to Vicarage Road after coaching the Hornets during the 2015/16 season, leading them to a 13th-placed finish and the FA Cup semi-finals before moving to Espanyol.
He remained with the La Liga side for nearly two years before a brief spell in China with Shanghai Shenhua, which ended in July.
Sanchez Flores has also coached Valencia and Benfica, and led Atletico Madrid to Europa League and European Super Cup glory.
Gracia departed after leading Watford to just one win in their last ten matches, a run that stretched back to April.
Gracia was less than a year into a four-and-a-half year contract at Vicarage Road. Watford also had the option to extend the deal by a further three years.