Elizabeth Montgomery

Elizabeth Montgomery (April 15th 1933 – May 18th 1995) was an American film, stage, and television actress.

4x09
Through out the episode "Out of Sync, Out of Mind" Samantha Stephens (played by Elizabeth Montgomery) is seen wearing sandals that expose her feet when she discovered that her voice is out of sync from her mouth.

4x26
"To Twitch or Not to Twitch" has Samantha briefly barefoot when she is changing from her sandals to her heels, However the scene is played in fast forward due to Sam using a spell to make her go fast.