Platinum Resistant Ovarian Cancer Evaluation of Doxil and Vintafolide (MK-8109, EC145) Combination Therapy (8109-009, EC-FV-04)

2.5 mg IV bolus on Days 1,3,5 and 15,17,19 of a 4-week cycle

50 mg/m\^2 (with dose based on ideal body weight for participants whose measured body weight is greater than their ideal body weight) intravenous infusion on Day 1 of a 4 week cycle. Dose reductions permitted for toxicity.

During the screening period, participants at centers with EC20 imaging capability will receive a single intravenous injection of 0.1 mg EC20 labeled with 20-25 mCi technetium-99m followed by an imaging procedure. A second injection and imaging may be done after all therapy with the study drugs is done.