Premier League leader Everton twice came from behind to level an absorbing contest at Goodison Park.
Michael Keane cancelled out Sadio Mane's third-minute opener – the fastest goal scored in this fixture in Premier League history – and Dominic Calvert-Lewin did the same after Mohamed Salah scored his 100th goal for the Reds.
Richarlison was sent off for a rash challenge on Thiago Alcantara, and that indiscretion looked to have been doubly punished in stoppage-time by Henderson, only for VAR to intervene and keep Everton three points ahead of Liverpool – unbeaten in 23 Merseyside derbies in all competitions – at the top of the table.