The Welsh legend is seen in our gallery below prepping his ten artists for this weekend's battles, which will see half leave and half make the live shows.
Like his fellow coaches, Sir Tom will be helping the artists improve their vocals, technique and performance skills before they go head to head.
Amongst those doing battle on Team Tom are Lindsay Butler, Leanne Mitchell and Matt and Sueleen Fletcher.
Who will come out on top? You'll have to tune into Saturday and Sunday's show to find out. Or you can read our Voice UK finalists predictions, if you want to know what we reckon.
Browse the pictures below...