Top quality! Dan Briggs is far superior to Jim Phelps. He plays the part as a ruthless and intense character very well.
Sadly, he only starred as team leader in the first series.
Steven Hill (Dan) left because his religious beliefs would not permit him to work on Saturdays, which in turn caused problems when filming over-ran the weekday shooting schedule.
A slight digression there, but this is the best of the 7 seasons of MI made for TV.