Shortly after the University match, Mitchell-Innes was once again invited to play for the Gentlemen against the Players, on this occasion in the more prestigious Lord's fixture. Returning to Somerset for his summer break, Mitchell-Innes struck his first century in county cricket, hitting 139 runs as Somerset followed on against Lancashire. He appeared in seven of Somerset's twenty-six fixtures, and although he was well short of his teammates' total runs for the season, he led Somerset's batting averages in 1935, accruing his 420 runs at an average of 38.18. At the end of the summer, he was chosen to play for an "England XI" against South Africa during the Folkestone cricket festival, though in a resounding victory for the tourists, he failed to make much impact.