Ousman See’s third hat-trick of the season ensured Stephen McKenzie’s Tynecastle side left Home Park victorious as well as gaining momentum for a title challenge in the second half of the campaign.
Coldstream on the other hand, can count this as an off day with nothing going right from the first whistle to the last.
The visitors looked sharp immediately from the kick-off and could have gone ahead through See early on, Travis getting his toe end to the ball to turn it behind for a corner and prevent a tap in.
The side in maroon gradually took control of the match and thoroughly deserved their lead ten minutes in - Tony Muir dropping deep to find See, who turned to setup former Livingston player Dean Cummings, who fired past Lucas Glasper in the Streamers goal.
The lead, however was short lived as an accurate inswinging free kick from Lambert found Kieran Ainslie, who lost his marker to nod home the equaliser.
Tynecastle regained the lead with See scoring on the break, Coldstream having to clear their lines on another occasion.
In the second hald Aaron Punton went close for the Streamers, but See scored twice more to give Tynecastle the win, his hat-trick coming from the penalty spot after home skipper Ainslie was sent off for a foul.
Coldstream: Glasper, Birkett, Allan, Ainslie (C) , Travis, Wales, Brown, Punton, Hebdon, Lambert, S. Simpson. SUBS - Turner, Crawford, Chisholm.