Here's an old pic of Pat Troughton and Frasier Hines working together in 1964, before their Who days, in 'A Death and a Discovery', the first episode of 'Smuggler's Bay', based on John Meade Falkner's novel 'Moonfleet'.
Frazer Hines was chosen to play Who assistant Jamie McCrimmon at the recommendation of BBC Head of Serials Shaun Sutton. Hines had enjoyed a recurring role in Emergency Ward 10 and had unsuccessfully auditioned for the part of Ben Jackson in 1966.
Image grabbed from here.
Doctor Who Magazine 516
2 hours ago