Which episode of Doogie Howser, M.D. featured a Peterbilt 359?
Just this morning, I would've assumed that there was absolutely no way of answering that without watching all of Doogie Howser, M.D. (complication: it's not on Netflix, and the last thing you have time for is another series binge, anyway). You'd also need complete confidence in your ability to identify a Peterbilt 359 through the fuzzy standard definition and big hair of an early-’90s television program.
Thankfully, former Verge editor and all-around great guy Paul Miller brought my attention to IMCDb, which is literally IMDb for cars. You can search both ways, either retrieving a list of all cars found in a particular movie or TV show, or by choosing a model and getting a list of all the programs where it can be found. You also get a still of the actual scene where the vehicle appears.
IMCDb isn't new — it's actually been around since 2004, and they appear to have amassed a shockingly complete list of car cameos. You will be stuck on this site for hours, possibly days.
Now, if you'll excuse me, I'm going to watch every single thing with a Countach in it.