The Red Headed League is a Sherlock Holmes television movie from 1954.
It stars Ronald Howard as Holmes, H. Marion Crawford as Dr. Watson and Archie Duncan as Inspector Lestrade.
A man applies for a job that is extremely well-paid, working for The Red Headed League.
He gets the job but it’s all part of a plot to take him away from his office.
He has to copy the Encyclopedia Britannica by hand.
It’s laborious and pointless but he takes the money.
Then one day everyone connected with the job disappears.
Holmes is on the case and he discovers it was just to get him out the way so that crooks could tunnel into the bank from his office.
Movie pages here.