Three ways that I know of. One is to use LCDs instead of TVs, although TVs shouldn’t be an issue.
Another is a camcorder with a variable shutter. This feature is sometimes called clearscan, amongst other things, and allows the camera’s shutter to be set to the monitor’s exact scan rate.
Lastly, if it’s a computer monitor, try to set the frame rate to 60 Hz. It may not help but it’s worth a try.