CBS’s Blue Bloods pushes the notion that easy access to guns and street causes suicides. The claim that suicides with guns have a higher success rate than other methods of suicide is simply false. This is not the first television show where the causation between guns and suicide is pushed (e.g., see this other CBS show from 2019). Other television show bias on gun ownership can be found here.
For example, a study by Los Angeles County looked at 4,117 cases of completed suicide in Los Angeles County during a four year period, and found that the success rate for being hit by a train is virtually the same as for a gunshot to the head or a shotgun to the chest. The study also estimated that the amount of pain and discomfort from being hit by a train was about half that of the other two methods. Other evidence shows that having more people carry concealed handguns, so that more people have handguns with them whenever they might be depressed, has no impact on suicide rates. Even when guns are banned, there are no drops in suicide rates. See also evidence of locking up guns on suicide available here.
(Blue Bloods, CBS, Season 10, Episode 12, January 10, 2020)