ICE defenseman Brayden McNabb had 2 goals in a 4-1 win in Medicine Hat.
Joe Antilla and Steele Boomer had the other goals.
The clubs wil meet for the 6th and final time Sunday night at the Rec-Plex.
ICE are in 6th, 3 points behind the 5th place Tigers and also have a game in hand. Lethbridge is 7th, 1 point back of the ICE.
Andrew Bailey had 2 assists and passed Ryan Russell for 5th in all-time career points with 218.
Sunday Bailey will tie Adam Cracknell for 4th in all-time regular season games played at 283.
Ian Barteaux left the game late in the 2nd period after receieving a Tigers' players thumb in his eye. The gouging left him with very poor vision and is questionable for Sunday's game.