General Rule:
Writer-last-name, First-initial. (Writer), & Director-last-name, First-initial. (Director). (Year).Title of episode [TV series episode]. In Executive producer last-name, First-Initial (Executive producer), Title of series. Production Company.
Example:
Whedon, J. (Writer), Des Hotel, R. (Writer), Batali, D. (Writer), & Sarafian, D. (Director). (1998). Killed by death [TV series episode]. In J. Whedon, et al. (Executive Producers), Buffy the Vampire Slayer. WB Television Network.