The actor has flown dance partner Kristina Rihanoff out so he can practise his routine, following concerns he could be sent home this weekend, The Sun reports.
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Rihanoff managed to get on the same flight as Salmon and a film crew have gone along to film the trip for Strictly Come Dancing.
"The Strictly stars often have to travel around with their celebrity partners but jetting off to Vancouver is quite unusual," a source said.
"But Colin had no choice as he had some scenes to shoot that couldn't be delayed.
"He figured he could balance both shows but now he's bricking it that he won't get enough practice. They only managed to squeeze in a few minutes when they first got there."
Salmon tweeted: "Kristina has just left the set of Arrow. We had fun and got some great footage. Looking forward to getting down to serious training tomorrow."
Photo gallery - Strictly show 3:
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