"The Big Bang Theory" season 10 has seen Amy (Mayim Bialik) and Sheldon (Jim Parsons) start living together because the former's apartment was under repairs. In the upcoming fifth episode, the two will be getting close to the breaking point when Amy fails to follow Sheldon's strict bathroom schedule.

Titled "The Hot Tub Contamination," season 10 episode 5 will continue keeping Amy and Sheldon together in one apartment, but this time around, Sheldon will be so frustrated with Amy that he will even threaten to break up with her.

According to the synopsis, as per Cartermatt, Leonard (Johnny Galecki) and Penny (Kaley Cuoco) will have to step in and stop a quarrel between Amy and Sheldon regarding the bathroom schedule. It is hinted that Amy not only struggles with it, but she completely refuses to follow it.

While Amy and Sheldon teeter on the edge of breaking up and ending their five-week experiment of living together, Howard (Simon Helberg) and Bernadette (Melissa Rauch) will be dealing with unexpected guests when they decide to stay home instead of heading out on a planned vacation.

Given that Kevin Sussman is listed as a guest star for the episode, it is possible that his character, Stuart, will be dropping by and will not get the hint that he is unwanted in their house. Fans will recall that Stuart lived in Howard's home for a long while when the comic bookstore burned down.

The report also points out that, back in episode 4, Howard and Bernadette discovered that Raj (Kunal Nayyar) discreetly found out the gender of their baby, without their consent. This upcoming episode may see Raj confess and finally tell the couple the gender of their child or it may continue as a running gag until Bernadette gives birth.

"The Big Bang Theory" season 10 episode 5 is scheduled to air on Oct. 17.