The show is to begin its sixth season Sunday. Former co-star Metcalfe rejoins the cast in the episode airing Oct. 11.
"A chance encounter reunites Gaby with her sexy ex-lover and gardener, John Rowland; Bree contemplates a weekend getaway with Karl; Lynette and Tom break the news to their kids that she's pregnant again; and Susan is convinced Angie's son is responsible for her daughter's attack," ABC said in a news release.
"Desperate Housewives" stars Teri Hatcher, Felicity Huffman, Marcia Cross and Eva Longoria Parker.
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