Neil (Greeks Bearing Gifts)

From Tardis Wiki, the free Doctor Who reference

Neil was a man who married Carol and had a son, Danny. Carol broke up with Neil and became engaged to Lawrence. Angered, Neil came round to Carol's house and planned to kill her, Danny and himself as a revenge plot on Lawrence but was hit round the head with a golf club by Toshiko Sato. (TV: Greeks Bearing Gifts)