30 Rock (2006)

S05E15 It's Never Too Late for Now

Jenna steps in to assist Liz, who is struggling to move on from her heartache. Meanwhile, new dad Jack grapples with exhaustion, which starts to cloud his judgment and weaken his business acumen. In a lighter turn of events, Pete and Frank decide to channel their creativity by forming a rock band, bringing a burst of energy to their lives.