Goodnight Sweetheart (1993)

S4E2 In the Mood

Yvonne and Phoebe are both expecting and not feeling their best. Despite this, Yvonne and Gary decide to look after Gary's nephew, Arthur. However, chaos ensues when Arthur disappears during his stay, leading them to suspect he may have time-traveled back to 1942. It appears that Gary might not be the only one with the ability to tap into the time portal after all.