The Lucy Show S1 E7

Season 1, Episode 7: Lucy Is a Kangaroo for a Day
Lucy takes a secretarial temp job in order to afford a bicycle for Jerry's birthday. Lost in a modern office, she has disastrous contact with the electric pencil sharpener, the water cooler, and the electric typewriter. Her exasperated employer sends on out on errands when her dress gets caught in an elevator and unravels. Not wanting to deliver contracts in her unmentionables, Lucy borrows a kangaroo costume to finish her chores.