That was "A kind of a Stopwatch" 
and yeah, it makes the cut with character actor Richard Erdman as the--
Wait for it--
Untimely Patrick Thomas McNulty.
What about the episode where a man is given a watch that stops time? While emptying a bank vault, he drops and breaks the watch. Does the list include that episode?
That was "A kind of a Stopwatch" and yeah, it makes the cut with character actor Richard Erdman as the--
Wait for it--
Untimely Patrick Thomas McNulty.