Anton Murphy and Jay Mckray, who were nominated earlier in the week and remain eligible for eviction, have voted that the pair also face the public vote.
Having overheard his negative comments earlier this week, Jay ultimately nominated Harry, while Anton chose Jem with little hesitation.
Lines close during Friday night's eviction show. Whoever receives the fewest number of votes to save will be eliminated from the Channel 5 programme.
Both Jay and Anton escaped last week's eviction after Aden Theobald was sent home by viewers.
Chosen by their fellow housemates on Monday, Jay and Anton were sent to a private crypt and given a Halloween-themed task to change the course of this week's nominations.
Watch Jay and Anton return to the Big Brother house and make their nominations below: