1x13 - Three's a Crowd

Vicky invites her friend, Dorothy, over, to cheer her up because she recently broke up with her boyfriend. Vicky invites her to have dinner with Jack and her. Dorothy has new contacts which make her blink, but Jack misunderstands it and thinks she's blinking at him because she has the hots for him. The situation confuses Jack even more when he overhears Dorothy on the phone telling a friend that she has met a new man, who Jack thinks is him when it is actually another person altogether.