Encourage the distant students to keep a copy of whatever papers they send to you through the mail. Teaching a televised course is a team effort. Make sure everyone on that team has the same information about what you're going to do in class, when you're going to do it, and what you're needs are. If you're successful reaching that student you'll reach everyone else. It doesn't work the other way around.
Television is a visual medium.
In a way, it's a sophisticated game of charades. Television is good at showing things close-up. Studies indicate that it's difficult for anyone to attend to a TV screen longer than 10-15 minutes without a change of stimulus. Televised teaching should be better than a traditional course because of the preparation, support team, and the technology tools. Invest time in the first session making the students feel comfortable with the course being on television.