The 30-year-old former Arsenal 'keeper joined Hibs in 2009 and is an important player for Fenlon, making a number of fine saves in the crucial victory at Inverness.
Fenlon knew Doherty from his time at Bohemians and moved to sign him on loan in the January transfer window. The 20-year-old is back in the side after a sticky patch.
On a season-long loan from Celtic, but Towell (right) doesn't appear to have made a good impression on the new boss and has barely featured since the new recruits arrived in January.
Another temporary January capture, with O'Donovan moving after being starved of chances at Coventry. The ex-Cork City and Sunderland man has been restricted to sub cameos in recent weeks.
Many expected Fenlon to do plenty of shopping in the League of Ireland, but his only direct capture was Doyle, who was prolific with Sligo in 2011. Has scored twice, but is behind Garry O'Connor and Leigh Griffiths.