Ah, the beach episode, a classic of the 1980s crime fighter genre, brought to vivid life in last night’s episode of Knight Rider, when Mike Traceur must infiltrate a band of (what else?) surfing mercenaries to locate a missing secret agent. Fortunately, an episode on the beach creates a perfect opportunity to bust out what has to be one of the coolest, if not always the most useful, things a super car can do, which is go into submarine mode. In last night’s episode a rocket actually blasted KITT off a cliff and into the water. Kitt’s shielding protected Traceur and this week’s sidekick, Zoe Chae, and he made a mid-air transformation to Aqua-KITT. Safe below the waves, Traceur and Chae pondered their next course of action.The episode got me wondering: Could we actually build a submarine car? As you can see from the video clip (skip ahead to 2:35 in the video): yes.