EXETER Chiefs kept alive their Champions Cup hopes by running in six tries at Sandy Park to beat Castres 34-12.
They now face a shoot-out with group leaders Munster next Saturday.
The Chiefs must beat the Irish side at Thomond Park to have a chance of winning the pool, or qualifying as a runner-up and joining Saracens as the only other English club in the last eight.
Fit-again England star Jack Nowell got Exeter off the mark on Sunday against Castres with a great try from 35 metres out.
The visitors hit back with a try by Taylor Paris but Exeter went in at the break 17-5 ahead with Joe Simmonds and Jonny Hill touching down.
Soon after the break winger Tom O’Flaherty scored a fourth try for Chiefs, but Castres responded almost immediately when Thomas Combezou went over for a fine touch-down.
However, the Chiefs, roared on by their supporters, claimed a fifth try when Henry Slade went over from close range after good play by Nic White.
Castres had to play the final 20 minutes with 14 men after Tudor Stroe was red carded.
And the Chiefs took advantage of the extra man to bag a sixth try when Luke Cowan-Dickie went over from close range.