"Black Day for Aries") is a 1971 Italian giallo film directed by Luigi Bazzoni.

The party also includes Helene, who was at one point romantically involved with Andrea, but could not continue due to his drinking problem.

A nearby couple by the names of Walter Auer and Giulia Soavi come to John’s aid.

Andrea wants to get information out of John about his attacker but is stopped due to the hospital’s strict visiting rules.

After finding that it has been moved away from its original place, she crawls over to the top of the stairs where she is grabbed from behind by a gloved assailant.

It is confirmed that the two cases are connected when they realize that a glove was found at both the John Lubbock crime scene and Sofia Bini’s.

He claims that they had received a suspicious phone call prior to Sofia’s death, though he could not tell if it was a man or a woman.

He finds him paying a large sum of cash to Walter, the witness of the John Lubbock attack.

Whilst Andrea gives John a ride home, he learns that he too had gotten a mysterious phone call, but unlike Sofia’s, he claims that there seemed to be nobody on the other end.

Here, Andrea learns that they are together to watch the young couple, Walter and Giulia, have sexual intercourse, which is illegal as they are both technically minors.

After being informed about Isabel’s death, John gives in his notice at the school and decides to move back to Australia.

Nothing has come from his stay besides being viciously attacked which left him still wearing a neck brace and finding out Isabel was going to marry his friend Edouard.

The only problem is that John’s attack couldn’t have been done by the same person that’s been killing everyone as every murder has been on a Tuesday, which is when Giulia‘s father allegedly goes up North for his occupation.

The following week, Helene is driven to the airport to meet with her lawyer to discuss details of the divorce she had with her ex-husband, Charles, who is also the father of their child, Tony.

Andrea rushes over to Helene’s house to find Tony being strangled by the killer, now shown to be wearing a mask.

He is unmasked and revealed to be John Lubbock, who committed the murders to cover up his real motive, which was jealousy over Edouard marrying Isabel.

This all had become obvious when Andrea found out from Richard that John’s neck brace should have been removed weeks ago.

"[3] McGillivray stated later that Bazzoni's "briskly paced direction (combined with the efforts of the British censor) contrives to sweep it all under the carpet as quickly as possible.

[4] Marina Antunes for the Alliance of Women Film Journalists while conceding that "Sometimes it’s just a bit too much and even the most astute viewer is likely to get lost among some of the weeds," praised the cinematography and Nero's acting, finally concluding that "While it sometimes loses its way, in the end The Fifth Cord comes together in an entertaining, occasionally awe-inspiring package that stands the test of time as a fine example of the giallo genre.