Bugs and listening devices are never covert on TV shows. The same goes for time bombs or other explosive devices. On TV they always have blinking lights (red is a popular color), audible beepers and/or a timer counting down on them. Some bombs have all three. Older depictions have a loudly ticking alarm clock taped to a bundle of dynamite. They also usually sprout wires, expose naked circuit boards, detonating caps or are hooked to visible wrapped sticks of dynamite or neatly stacked piles of a labeled military explosive like C4 or COMP-B. Examples of Incredibly Obvious Bomb include: