My Secret Identity

Derek McGrath (Dr. Benjamin Jeffcoate) and Jerry O'Connell (Andrew Clements) are the only actors to appear in all 72 episodes of the series.

Andrew gains the ability to "float," meaning that he is lighter than air and needs to external items in order to keep him grounded or to control his direction. However, his own clothes should be enough to keep him grounded, and running (with his super-speed) shouldn't be possible without it causing him to go flying up into the air due to air resistance.