In what decade did the director of the film The Day of the Dolphin begin his career? 
The Day of the Dolphin: The Day of the Dolphin is a 1973 American science-fiction thriller film directed by Mike Nichols and starring George C. Scott. Mike Nichols:  Nichols began his career in the 1950s with the comedy improvisational troupe, The Compass Players, predecessor of The Second City, in Chicago.
1950s