23rd Nov 2003
Past Tense - S1-E4
Plot hole: When Lindsay brings Tru breakfast in bed on the second version of the day, she is excited that Tru remembered her birthday, and she also mentions that nobody else did. But it's still very early in the morning. It's not at all reasonable to assume that anybody forgot her birthday just because they didn't call before 8am.
23rd Nov 2003
Past Tense - S1-E4
Plot hole: Meredith submits to the drug test at her office. In the next scene, which takes place later the same evening, Harrison tells Tru that Meredith's test came back positive and she was immediately fired. But it takes at least 24 hours to get a result from a urine test at all. If the test is positive, the sample must be subjected to a more thorough examination. It usually takes at least 72 hours to get the results in that case. There's no way Meredith's positive results could have come back in less than six hours, even if a lab had been open late in the evening.
23rd Nov 2003
Past Tense - S1-E4
Plot hole: Meredith is subjected to a random drug test at work. However, the drug test is announced late at night. Tru is already working her "graveyard shift" at the morgue, so we know the regular workday is over. Hardly anyone would be in the office. Therefore, it doesn't make sense for the company to be administering this drug test, said to be requisite for all employees, at that time.
20th Nov 2003
Plot hole: When Marco brings Andrew's corpse to the morgue the first time the evening happens, he says that Andrew was died "in his ex-wife's house." However, during the second instance of the day, it is eventually revealed that Sarah is actually still married to Andrew, and they are just separated. Sarah may have lied to Harrison about that, but the police would have gotten accurate information. In fact, when Sarah calls the police (the second time), she refers to Andrew as "her husband."