Zimbabwe's opposition Movement for Democratic Change is sharing power with President Robert Mugabe and his Zanu PF party.
From the start, the coalition government has struggled with disagreements and animosity.
Arthur Mutambara is Zimbabwe's deputy prime minister. Stephen Sackur asked him if power-sharing could rescue Zimbabwe from political and economic crisis, and whether sanctions should be lifted immediately.
Watch the full interview with Arthur Mutambara on HARDtalk on Thursday 8 October 2009.
BBC News Channel: 0430, 2330 BST
BBC World: 0330, 0830, 1430, 2030, 2230 GMT.