Dreams can often be a mix of our subconscious thoughts, feelings, and experiences. In your dream, the figure who resembled your father but was not him could symbolize authority, protection, or a paternal figure in your life. The fact that he is the leader of a gang suggests a conflict between feelings of safety and danger, possibly reflecting a struggle with authority or control in your waking life.
The presence of cops from a TV show may indicate a desire for justice or support in confronting challenges. The act of biting his throat and stabbing him could symbolize a need to confront and eliminate something or someone that feels threatening or harmful in your life. Holding his hand as he dies may represent a complex mix of emotions, such as grief, loss, or a sense of responsibility for the outcome.
Overall, this dream might reflect your internal conflicts regarding authority, protection, and perhaps unresolved issues with figures of power in your life. It could be beneficial to explore these themes further, perhaps considering if there are any current situations where you feel threatened or in conflict with authority. Reflecting on these feelings may help you better understand your emotions and navigate similar situations in your waking life.