In episode 4 of Just Act Normal, the three siblings—Tiana, Tionne, and Tanika—continue to struggle with the absence of their mother Jackie, who has gone missing. They face increasing pressure from external forces such as their estranged father Leo, who wants Jackie to sign divorce papers, and Tanika's concerned teacher Miss Jenkins, who is eager to speak to their mother. The siblings try to keep their family together by hiding the truth about their mother's disappearance and enlist the help of 'Fake Jackie' to maintain the illusion that their mother is still present, all while dealing with the complications that arise from this deception.

The siblings attempt to keep their family together by hiding the truth about their mother's disappearance from the authorities and others who might intervene. They enlist the help of 'Fake Jackie,' a person who poses as their mother to appease concerns from people like their teacher Miss Jenkins. They also receive unexpected assistance from Jackie’s drug dealer, Dr Feelgood, which helps them maintain their secret and manage the challenges they face.

Dr Feelgood, who is Jackie’s drug dealer, unexpectedly helps the siblings in episode 4. He assists them in their efforts to keep the family together and maintain the facade that their mother is still around, including supporting the use of 'Fake Jackie' to deceive those concerned about the children's welfare.

New complications in episode 4 include the estranged father Leo pushing for Jackie to sign divorce papers, which threatens the siblings' efforts to keep their family intact. Additionally, Tanika’s teacher Miss Jenkins becomes increasingly concerned and wants to speak to their mother, putting pressure on the siblings to maintain their deception. These challenges heighten the tension as the siblings try to evade authorities and keep their secret safe.

Episode 4 of Just Act Normal continues the series' balance of dark comedy and drama. The tone reflects the siblings' stubborn optimism despite their difficult circumstances, blending humor with the serious challenges they face in trying to keep their family together after their mother's disappearance.