Possible Clues:

• Officer in charge of a military unit
• Military figure, computer expert, embracing married bloke
• One who gives orders, upset nerd
• For him to begin to be so firm and grand is enough to make a fellow turn red
• One hoping to be captain, who's already giving the orders?
• Firm male, chap facing the German officer
• Naval rank
• Presiding officer
• One in authority
• Captain's subordinate